Type.h revision 1ab55e9bb87d98bff1d42c7a0ee502c64755d9f5
1//===--- Type.h - C Language Family Type Representation ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Type interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_TYPE_H 15#define LLVM_CLANG_AST_TYPE_H 16 17#include "clang/Basic/Diagnostic.h" 18#include "clang/Basic/IdentifierTable.h" 19#include "clang/Basic/Linkage.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "clang/Basic/Visibility.h" 22#include "clang/AST/NestedNameSpecifier.h" 23#include "clang/AST/TemplateName.h" 24#include "llvm/Support/Casting.h" 25#include "llvm/Support/type_traits.h" 26#include "llvm/ADT/APSInt.h" 27#include "llvm/ADT/FoldingSet.h" 28#include "llvm/ADT/PointerIntPair.h" 29#include "llvm/ADT/PointerUnion.h" 30 31using llvm::isa; 32using llvm::cast; 33using llvm::cast_or_null; 34using llvm::dyn_cast; 35using llvm::dyn_cast_or_null; 36namespace clang { 37 enum { 38 TypeAlignmentInBits = 4, 39 TypeAlignment = 1 << TypeAlignmentInBits 40 }; 41 class Type; 42 class ExtQuals; 43 class QualType; 44} 45 46namespace llvm { 47 template <typename T> 48 class PointerLikeTypeTraits; 49 template<> 50 class PointerLikeTypeTraits< ::clang::Type*> { 51 public: 52 static inline void *getAsVoidPointer(::clang::Type *P) { return P; } 53 static inline ::clang::Type *getFromVoidPointer(void *P) { 54 return static_cast< ::clang::Type*>(P); 55 } 56 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 57 }; 58 template<> 59 class PointerLikeTypeTraits< ::clang::ExtQuals*> { 60 public: 61 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } 62 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { 63 return static_cast< ::clang::ExtQuals*>(P); 64 } 65 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; 66 }; 67 68 template <> 69 struct isPodLike<clang::QualType> { static const bool value = true; }; 70} 71 72namespace clang { 73 class ASTContext; 74 class TypedefDecl; 75 class TemplateDecl; 76 class TemplateTypeParmDecl; 77 class NonTypeTemplateParmDecl; 78 class TemplateTemplateParmDecl; 79 class TagDecl; 80 class RecordDecl; 81 class CXXRecordDecl; 82 class EnumDecl; 83 class FieldDecl; 84 class ObjCInterfaceDecl; 85 class ObjCProtocolDecl; 86 class ObjCMethodDecl; 87 class UnresolvedUsingTypenameDecl; 88 class Expr; 89 class Stmt; 90 class SourceLocation; 91 class StmtIteratorBase; 92 class TemplateArgument; 93 class TemplateArgumentLoc; 94 class TemplateArgumentListInfo; 95 class Type; 96 class ElaboratedType; 97 struct PrintingPolicy; 98 99 template <typename> class CanQual; 100 typedef CanQual<Type> CanQualType; 101 102 // Provide forward declarations for all of the *Type classes 103#define TYPE(Class, Base) class Class##Type; 104#include "clang/AST/TypeNodes.def" 105 106/// Qualifiers - The collection of all-type qualifiers we support. 107/// Clang supports five independent qualifiers: 108/// * C99: const, volatile, and restrict 109/// * Embedded C (TR18037): address spaces 110/// * Objective C: the GC attributes (none, weak, or strong) 111class Qualifiers { 112public: 113 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. 114 Const = 0x1, 115 Restrict = 0x2, 116 Volatile = 0x4, 117 CVRMask = Const | Volatile | Restrict 118 }; 119 120 enum GC { 121 GCNone = 0, 122 Weak, 123 Strong 124 }; 125 126 enum { 127 /// The maximum supported address space number. 128 /// 24 bits should be enough for anyone. 129 MaxAddressSpace = 0xffffffu, 130 131 /// The width of the "fast" qualifier mask. 132 FastWidth = 3, 133 134 /// The fast qualifier mask. 135 FastMask = (1 << FastWidth) - 1 136 }; 137 138 Qualifiers() : Mask(0) {} 139 140 static Qualifiers fromFastMask(unsigned Mask) { 141 Qualifiers Qs; 142 Qs.addFastQualifiers(Mask); 143 return Qs; 144 } 145 146 static Qualifiers fromCVRMask(unsigned CVR) { 147 Qualifiers Qs; 148 Qs.addCVRQualifiers(CVR); 149 return Qs; 150 } 151 152 // Deserialize qualifiers from an opaque representation. 153 static Qualifiers fromOpaqueValue(unsigned opaque) { 154 Qualifiers Qs; 155 Qs.Mask = opaque; 156 return Qs; 157 } 158 159 // Serialize these qualifiers into an opaque representation. 160 unsigned getAsOpaqueValue() const { 161 return Mask; 162 } 163 164 bool hasConst() const { return Mask & Const; } 165 void setConst(bool flag) { 166 Mask = (Mask & ~Const) | (flag ? Const : 0); 167 } 168 void removeConst() { Mask &= ~Const; } 169 void addConst() { Mask |= Const; } 170 171 bool hasVolatile() const { return Mask & Volatile; } 172 void setVolatile(bool flag) { 173 Mask = (Mask & ~Volatile) | (flag ? Volatile : 0); 174 } 175 void removeVolatile() { Mask &= ~Volatile; } 176 void addVolatile() { Mask |= Volatile; } 177 178 bool hasRestrict() const { return Mask & Restrict; } 179 void setRestrict(bool flag) { 180 Mask = (Mask & ~Restrict) | (flag ? Restrict : 0); 181 } 182 void removeRestrict() { Mask &= ~Restrict; } 183 void addRestrict() { Mask |= Restrict; } 184 185 bool hasCVRQualifiers() const { return getCVRQualifiers(); } 186 unsigned getCVRQualifiers() const { return Mask & CVRMask; } 187 void setCVRQualifiers(unsigned mask) { 188 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 189 Mask = (Mask & ~CVRMask) | mask; 190 } 191 void removeCVRQualifiers(unsigned mask) { 192 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 193 Mask &= ~mask; 194 } 195 void removeCVRQualifiers() { 196 removeCVRQualifiers(CVRMask); 197 } 198 void addCVRQualifiers(unsigned mask) { 199 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits"); 200 Mask |= mask; 201 } 202 203 bool hasObjCGCAttr() const { return Mask & GCAttrMask; } 204 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } 205 void setObjCGCAttr(GC type) { 206 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); 207 } 208 void removeObjCGCAttr() { setObjCGCAttr(GCNone); } 209 void addObjCGCAttr(GC type) { 210 assert(type); 211 setObjCGCAttr(type); 212 } 213 214 bool hasAddressSpace() const { return Mask & AddressSpaceMask; } 215 unsigned getAddressSpace() const { return Mask >> AddressSpaceShift; } 216 void setAddressSpace(unsigned space) { 217 assert(space <= MaxAddressSpace); 218 Mask = (Mask & ~AddressSpaceMask) 219 | (((uint32_t) space) << AddressSpaceShift); 220 } 221 void removeAddressSpace() { setAddressSpace(0); } 222 void addAddressSpace(unsigned space) { 223 assert(space); 224 setAddressSpace(space); 225 } 226 227 // Fast qualifiers are those that can be allocated directly 228 // on a QualType object. 229 bool hasFastQualifiers() const { return getFastQualifiers(); } 230 unsigned getFastQualifiers() const { return Mask & FastMask; } 231 void setFastQualifiers(unsigned mask) { 232 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 233 Mask = (Mask & ~FastMask) | mask; 234 } 235 void removeFastQualifiers(unsigned mask) { 236 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 237 Mask &= ~mask; 238 } 239 void removeFastQualifiers() { 240 removeFastQualifiers(FastMask); 241 } 242 void addFastQualifiers(unsigned mask) { 243 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"); 244 Mask |= mask; 245 } 246 247 /// hasNonFastQualifiers - Return true if the set contains any 248 /// qualifiers which require an ExtQuals node to be allocated. 249 bool hasNonFastQualifiers() const { return Mask & ~FastMask; } 250 Qualifiers getNonFastQualifiers() const { 251 Qualifiers Quals = *this; 252 Quals.setFastQualifiers(0); 253 return Quals; 254 } 255 256 /// hasQualifiers - Return true if the set contains any qualifiers. 257 bool hasQualifiers() const { return Mask; } 258 bool empty() const { return !Mask; } 259 260 /// \brief Add the qualifiers from the given set to this set. 261 void addQualifiers(Qualifiers Q) { 262 // If the other set doesn't have any non-boolean qualifiers, just 263 // bit-or it in. 264 if (!(Q.Mask & ~CVRMask)) 265 Mask |= Q.Mask; 266 else { 267 Mask |= (Q.Mask & CVRMask); 268 if (Q.hasAddressSpace()) 269 addAddressSpace(Q.getAddressSpace()); 270 if (Q.hasObjCGCAttr()) 271 addObjCGCAttr(Q.getObjCGCAttr()); 272 } 273 } 274 275 bool isSupersetOf(Qualifiers Other) const; 276 277 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } 278 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } 279 280 operator bool() const { return hasQualifiers(); } 281 282 Qualifiers &operator+=(Qualifiers R) { 283 addQualifiers(R); 284 return *this; 285 } 286 287 // Union two qualifier sets. If an enumerated qualifier appears 288 // in both sets, use the one from the right. 289 friend Qualifiers operator+(Qualifiers L, Qualifiers R) { 290 L += R; 291 return L; 292 } 293 294 Qualifiers &operator-=(Qualifiers R) { 295 Mask = Mask & ~(R.Mask); 296 return *this; 297 } 298 299 /// \brief Compute the difference between two qualifier sets. 300 friend Qualifiers operator-(Qualifiers L, Qualifiers R) { 301 L -= R; 302 return L; 303 } 304 305 std::string getAsString() const; 306 std::string getAsString(const PrintingPolicy &Policy) const { 307 std::string Buffer; 308 getAsStringInternal(Buffer, Policy); 309 return Buffer; 310 } 311 void getAsStringInternal(std::string &S, const PrintingPolicy &Policy) const; 312 313 void Profile(llvm::FoldingSetNodeID &ID) const { 314 ID.AddInteger(Mask); 315 } 316 317private: 318 319 // bits: |0 1 2|3 .. 4|5 .. 31| 320 // |C R V|GCAttr|AddrSpace| 321 uint32_t Mask; 322 323 static const uint32_t GCAttrMask = 0x18; 324 static const uint32_t GCAttrShift = 3; 325 static const uint32_t AddressSpaceMask = ~(CVRMask | GCAttrMask); 326 static const uint32_t AddressSpaceShift = 5; 327}; 328 329/// \brief Base class that is common to both the \c ExtQuals and \c Type 330/// classes, which allows \c QualType to access the common fields between the 331/// two. 332/// 333class ExtQualsTypeCommonBase { 334protected: 335 ExtQualsTypeCommonBase(const Type *BaseType) : BaseType(BaseType) { } 336 337 /// \brief The "base" type of an extended qualifiers type (\c ExtQuals) or 338 /// a self-referential pointer (for \c Type). 339 /// 340 /// This pointer allows an efficient mapping from a QualType to its 341 /// underlying type pointer. 342 const Type *BaseType; 343 344 friend class QualType; 345}; 346 347/// ExtQuals - We can encode up to four bits in the low bits of a 348/// type pointer, but there are many more type qualifiers that we want 349/// to be able to apply to an arbitrary type. Therefore we have this 350/// struct, intended to be heap-allocated and used by QualType to 351/// store qualifiers. 352/// 353/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers 354/// in three low bits on the QualType pointer; a fourth bit records whether 355/// the pointer is an ExtQuals node. The extended qualifiers (address spaces, 356/// Objective-C GC attributes) are much more rare. 357class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { 358 // NOTE: changing the fast qualifiers should be straightforward as 359 // long as you don't make 'const' non-fast. 360 // 1. Qualifiers: 361 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). 362 // Fast qualifiers must occupy the low-order bits. 363 // b) Update Qualifiers::FastWidth and FastMask. 364 // 2. QualType: 365 // a) Update is{Volatile,Restrict}Qualified(), defined inline. 366 // b) Update remove{Volatile,Restrict}, defined near the end of 367 // this header. 368 // 3. ASTContext: 369 // a) Update get{Volatile,Restrict}Type. 370 371 /// Quals - the immutable set of qualifiers applied by this 372 /// node; always contains extended qualifiers. 373 Qualifiers Quals; 374 375public: 376 ExtQuals(const Type *Base, Qualifiers Quals) 377 : ExtQualsTypeCommonBase(Base), Quals(Quals) 378 { 379 assert(Quals.hasNonFastQualifiers() 380 && "ExtQuals created with no fast qualifiers"); 381 assert(!Quals.hasFastQualifiers() 382 && "ExtQuals created with fast qualifiers"); 383 } 384 385 Qualifiers getQualifiers() const { return Quals; } 386 387 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } 388 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } 389 390 bool hasAddressSpace() const { return Quals.hasAddressSpace(); } 391 unsigned getAddressSpace() const { return Quals.getAddressSpace(); } 392 393 const Type *getBaseType() const { return BaseType; } 394 395public: 396 void Profile(llvm::FoldingSetNodeID &ID) const { 397 Profile(ID, getBaseType(), Quals); 398 } 399 static void Profile(llvm::FoldingSetNodeID &ID, 400 const Type *BaseType, 401 Qualifiers Quals) { 402 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"); 403 ID.AddPointer(BaseType); 404 Quals.Profile(ID); 405 } 406}; 407 408/// CallingConv - Specifies the calling convention that a function uses. 409enum CallingConv { 410 CC_Default, 411 CC_C, // __attribute__((cdecl)) 412 CC_X86StdCall, // __attribute__((stdcall)) 413 CC_X86FastCall, // __attribute__((fastcall)) 414 CC_X86ThisCall, // __attribute__((thiscall)) 415 CC_X86Pascal // __attribute__((pascal)) 416}; 417 418typedef std::pair<const Type*, Qualifiers> SplitQualType; 419 420/// QualType - For efficiency, we don't store CV-qualified types as nodes on 421/// their own: instead each reference to a type stores the qualifiers. This 422/// greatly reduces the number of nodes we need to allocate for types (for 423/// example we only need one for 'int', 'const int', 'volatile int', 424/// 'const volatile int', etc). 425/// 426/// As an added efficiency bonus, instead of making this a pair, we 427/// just store the two bits we care about in the low bits of the 428/// pointer. To handle the packing/unpacking, we make QualType be a 429/// simple wrapper class that acts like a smart pointer. A third bit 430/// indicates whether there are extended qualifiers present, in which 431/// case the pointer points to a special structure. 432class QualType { 433 // Thankfully, these are efficiently composable. 434 llvm::PointerIntPair<llvm::PointerUnion<const Type*,const ExtQuals*>, 435 Qualifiers::FastWidth> Value; 436 437 const ExtQuals *getExtQualsUnsafe() const { 438 return Value.getPointer().get<const ExtQuals*>(); 439 } 440 441 const Type *getTypePtrUnsafe() const { 442 return Value.getPointer().get<const Type*>(); 443 } 444 445 QualType getUnqualifiedTypeSlow() const; 446 447 friend class QualifierCollector; 448public: 449 QualType() {} 450 451 QualType(const Type *Ptr, unsigned Quals) 452 : Value(Ptr, Quals) {} 453 QualType(const ExtQuals *Ptr, unsigned Quals) 454 : Value(Ptr, Quals) {} 455 456 unsigned getLocalFastQualifiers() const { return Value.getInt(); } 457 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } 458 459 /// Retrieves a pointer to the underlying (unqualified) type. 460 /// This should really return a const Type, but it's not worth 461 /// changing all the users right now. 462 /// 463 /// This function requires that the type not be NULL. If the type might be 464 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). 465 Type *getTypePtr() const { 466 assert(!isNull() && "Cannot retrieve a NULL type pointer"); 467 uintptr_t CommonPtrVal 468 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 469 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 470 ExtQualsTypeCommonBase *CommonPtr 471 = reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); 472 return const_cast<Type *>(CommonPtr->BaseType); 473 } 474 475 Type *getTypePtrOrNull() const { 476 uintptr_t TypePtrPtrVal 477 = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); 478 TypePtrPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); 479 Type **TypePtrPtr = reinterpret_cast<Type**>(TypePtrPtrVal); 480 return TypePtrPtr? *TypePtrPtr : 0; 481 } 482 483 /// Divides a QualType into its unqualified type and a set of local 484 /// qualifiers. 485 SplitQualType split() const { 486 if (!hasLocalNonFastQualifiers()) 487 return SplitQualType(getTypePtrUnsafe(), 488 Qualifiers::fromFastMask(getLocalFastQualifiers())); 489 490 const ExtQuals *eq = getExtQualsUnsafe(); 491 Qualifiers qs = eq->getQualifiers(); 492 qs.addFastQualifiers(getLocalFastQualifiers()); 493 return SplitQualType(eq->getBaseType(), qs); 494 } 495 496 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } 497 static QualType getFromOpaquePtr(void *Ptr) { 498 QualType T; 499 T.Value.setFromOpaqueValue(Ptr); 500 return T; 501 } 502 503 Type &operator*() const { 504 return *getTypePtr(); 505 } 506 507 Type *operator->() const { 508 return getTypePtr(); 509 } 510 511 bool isCanonical() const; 512 bool isCanonicalAsParam() const; 513 514 /// isNull - Return true if this QualType doesn't point to a type yet. 515 bool isNull() const { 516 return Value.getPointer().isNull(); 517 } 518 519 /// \brief Determine whether this particular QualType instance has the 520 /// "const" qualifier set, without looking through typedefs that may have 521 /// added "const" at a different level. 522 bool isLocalConstQualified() const { 523 return (getLocalFastQualifiers() & Qualifiers::Const); 524 } 525 526 /// \brief Determine whether this type is const-qualified. 527 bool isConstQualified() const; 528 529 /// \brief Determine whether this particular QualType instance has the 530 /// "restrict" qualifier set, without looking through typedefs that may have 531 /// added "restrict" at a different level. 532 bool isLocalRestrictQualified() const { 533 return (getLocalFastQualifiers() & Qualifiers::Restrict); 534 } 535 536 /// \brief Determine whether this type is restrict-qualified. 537 bool isRestrictQualified() const; 538 539 /// \brief Determine whether this particular QualType instance has the 540 /// "volatile" qualifier set, without looking through typedefs that may have 541 /// added "volatile" at a different level. 542 bool isLocalVolatileQualified() const { 543 return (getLocalFastQualifiers() & Qualifiers::Volatile); 544 } 545 546 /// \brief Determine whether this type is volatile-qualified. 547 bool isVolatileQualified() const; 548 549 /// \brief Determine whether this particular QualType instance has any 550 /// qualifiers, without looking through any typedefs that might add 551 /// qualifiers at a different level. 552 bool hasLocalQualifiers() const { 553 return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); 554 } 555 556 /// \brief Determine whether this type has any qualifiers. 557 bool hasQualifiers() const; 558 559 /// \brief Determine whether this particular QualType instance has any 560 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType 561 /// instance. 562 bool hasLocalNonFastQualifiers() const { 563 return Value.getPointer().is<const ExtQuals*>(); 564 } 565 566 /// \brief Retrieve the set of qualifiers local to this particular QualType 567 /// instance, not including any qualifiers acquired through typedefs or 568 /// other sugar. 569 Qualifiers getLocalQualifiers() const { 570 Qualifiers Quals; 571 if (hasLocalNonFastQualifiers()) 572 Quals = getExtQualsUnsafe()->getQualifiers(); 573 Quals.addFastQualifiers(getLocalFastQualifiers()); 574 return Quals; 575 } 576 577 /// \brief Retrieve the set of qualifiers applied to this type. 578 Qualifiers getQualifiers() const; 579 580 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 581 /// local to this particular QualType instance, not including any qualifiers 582 /// acquired through typedefs or other sugar. 583 unsigned getLocalCVRQualifiers() const { 584 return getLocalFastQualifiers(); 585 } 586 587 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 588 /// applied to this type. 589 unsigned getCVRQualifiers() const; 590 591 /// \brief Retrieve the set of CVR (const-volatile-restrict) qualifiers 592 /// applied to this type, looking through any number of unqualified array 593 /// types to their element types' qualifiers. 594 unsigned getCVRQualifiersThroughArrayTypes() const; 595 596 bool isConstant(ASTContext& Ctx) const { 597 return QualType::isConstant(*this, Ctx); 598 } 599 600 // Don't promise in the API that anything besides 'const' can be 601 // easily added. 602 603 /// addConst - add the specified type qualifier to this QualType. 604 void addConst() { 605 addFastQualifiers(Qualifiers::Const); 606 } 607 QualType withConst() const { 608 return withFastQualifiers(Qualifiers::Const); 609 } 610 611 void addFastQualifiers(unsigned TQs) { 612 assert(!(TQs & ~Qualifiers::FastMask) 613 && "non-fast qualifier bits set in mask!"); 614 Value.setInt(Value.getInt() | TQs); 615 } 616 617 void removeLocalConst(); 618 void removeLocalVolatile(); 619 void removeLocalRestrict(); 620 void removeLocalCVRQualifiers(unsigned Mask); 621 622 void removeLocalFastQualifiers() { Value.setInt(0); } 623 void removeLocalFastQualifiers(unsigned Mask) { 624 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"); 625 Value.setInt(Value.getInt() & ~Mask); 626 } 627 628 // Creates a type with the given qualifiers in addition to any 629 // qualifiers already on this type. 630 QualType withFastQualifiers(unsigned TQs) const { 631 QualType T = *this; 632 T.addFastQualifiers(TQs); 633 return T; 634 } 635 636 // Creates a type with exactly the given fast qualifiers, removing 637 // any existing fast qualifiers. 638 QualType withExactLocalFastQualifiers(unsigned TQs) const { 639 return withoutLocalFastQualifiers().withFastQualifiers(TQs); 640 } 641 642 // Removes fast qualifiers, but leaves any extended qualifiers in place. 643 QualType withoutLocalFastQualifiers() const { 644 QualType T = *this; 645 T.removeLocalFastQualifiers(); 646 return T; 647 } 648 649 /// \brief Return this type with all of the instance-specific qualifiers 650 /// removed, but without removing any qualifiers that may have been applied 651 /// through typedefs. 652 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } 653 654 /// \brief Return the unqualified form of the given type, which might be 655 /// desugared to eliminate qualifiers introduced via typedefs. 656 QualType getUnqualifiedType() const { 657 QualType T = getLocalUnqualifiedType(); 658 if (!T.hasQualifiers()) 659 return T; 660 661 return getUnqualifiedTypeSlow(); 662 } 663 664 bool isMoreQualifiedThan(QualType Other) const; 665 bool isAtLeastAsQualifiedAs(QualType Other) const; 666 QualType getNonReferenceType() const; 667 668 /// \brief Determine the type of a (typically non-lvalue) expression with the 669 /// specified result type. 670 /// 671 /// This routine should be used for expressions for which the return type is 672 /// explicitly specified (e.g., in a cast or call) and isn't necessarily 673 /// an lvalue. It removes a top-level reference (since there are no 674 /// expressions of reference type) and deletes top-level cvr-qualifiers 675 /// from non-class types (in C++) or all types (in C). 676 QualType getNonLValueExprType(ASTContext &Context) const; 677 678 /// getDesugaredType - Return the specified type with any "sugar" removed from 679 /// the type. This takes off typedefs, typeof's etc. If the outer level of 680 /// the type is already concrete, it returns it unmodified. This is similar 681 /// to getting the canonical type, but it doesn't remove *all* typedefs. For 682 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is 683 /// concrete. 684 /// 685 /// Qualifiers are left in place. 686 QualType getDesugaredType(ASTContext &Context) const { 687 return getDesugaredType(*this, Context); 688 } 689 690 SplitQualType getSplitDesugaredType() const { 691 return getSplitDesugaredType(*this); 692 } 693 694 /// IgnoreParens - Returns the specified type after dropping any 695 /// outer-level parentheses. 696 QualType IgnoreParens() const { 697 return QualType::IgnoreParens(*this); 698 } 699 700 /// operator==/!= - Indicate whether the specified types and qualifiers are 701 /// identical. 702 friend bool operator==(const QualType &LHS, const QualType &RHS) { 703 return LHS.Value == RHS.Value; 704 } 705 friend bool operator!=(const QualType &LHS, const QualType &RHS) { 706 return LHS.Value != RHS.Value; 707 } 708 std::string getAsString() const { 709 return getAsString(split()); 710 } 711 static std::string getAsString(SplitQualType split) { 712 return getAsString(split.first, split.second); 713 } 714 static std::string getAsString(const Type *ty, Qualifiers qs); 715 716 std::string getAsString(const PrintingPolicy &Policy) const { 717 std::string S; 718 getAsStringInternal(S, Policy); 719 return S; 720 } 721 void getAsStringInternal(std::string &Str, 722 const PrintingPolicy &Policy) const { 723 return getAsStringInternal(split(), Str, Policy); 724 } 725 static void getAsStringInternal(SplitQualType split, std::string &out, 726 const PrintingPolicy &policy) { 727 return getAsStringInternal(split.first, split.second, out, policy); 728 } 729 static void getAsStringInternal(const Type *ty, Qualifiers qs, 730 std::string &out, 731 const PrintingPolicy &policy); 732 733 void dump(const char *s) const; 734 void dump() const; 735 736 void Profile(llvm::FoldingSetNodeID &ID) const { 737 ID.AddPointer(getAsOpaquePtr()); 738 } 739 740 /// getAddressSpace - Return the address space of this type. 741 inline unsigned getAddressSpace() const; 742 743 /// GCAttrTypesAttr - Returns gc attribute of this type. 744 inline Qualifiers::GC getObjCGCAttr() const; 745 746 /// isObjCGCWeak true when Type is objc's weak. 747 bool isObjCGCWeak() const { 748 return getObjCGCAttr() == Qualifiers::Weak; 749 } 750 751 /// isObjCGCStrong true when Type is objc's strong. 752 bool isObjCGCStrong() const { 753 return getObjCGCAttr() == Qualifiers::Strong; 754 } 755 756private: 757 // These methods are implemented in a separate translation unit; 758 // "static"-ize them to avoid creating temporary QualTypes in the 759 // caller. 760 static bool isConstant(QualType T, ASTContext& Ctx); 761 static QualType getDesugaredType(QualType T, ASTContext &Context); 762 static SplitQualType getSplitDesugaredType(QualType T); 763 static QualType IgnoreParens(QualType T); 764}; 765 766} // end clang. 767 768namespace llvm { 769/// Implement simplify_type for QualType, so that we can dyn_cast from QualType 770/// to a specific Type class. 771template<> struct simplify_type<const ::clang::QualType> { 772 typedef ::clang::Type* SimpleType; 773 static SimpleType getSimplifiedValue(const ::clang::QualType &Val) { 774 return Val.getTypePtrOrNull(); 775 } 776}; 777template<> struct simplify_type< ::clang::QualType> 778 : public simplify_type<const ::clang::QualType> {}; 779 780// Teach SmallPtrSet that QualType is "basically a pointer". 781template<> 782class PointerLikeTypeTraits<clang::QualType> { 783public: 784 static inline void *getAsVoidPointer(clang::QualType P) { 785 return P.getAsOpaquePtr(); 786 } 787 static inline clang::QualType getFromVoidPointer(void *P) { 788 return clang::QualType::getFromOpaquePtr(P); 789 } 790 // Various qualifiers go in low bits. 791 enum { NumLowBitsAvailable = 0 }; 792}; 793 794} // end namespace llvm 795 796namespace clang { 797 798/// Type - This is the base class of the type hierarchy. A central concept 799/// with types is that each type always has a canonical type. A canonical type 800/// is the type with any typedef names stripped out of it or the types it 801/// references. For example, consider: 802/// 803/// typedef int foo; 804/// typedef foo* bar; 805/// 'int *' 'foo *' 'bar' 806/// 807/// There will be a Type object created for 'int'. Since int is canonical, its 808/// canonicaltype pointer points to itself. There is also a Type for 'foo' (a 809/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next 810/// there is a PointerType that represents 'int*', which, like 'int', is 811/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical 812/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type 813/// is also 'int*'. 814/// 815/// Non-canonical types are useful for emitting diagnostics, without losing 816/// information about typedefs being used. Canonical types are useful for type 817/// comparisons (they allow by-pointer equality tests) and useful for reasoning 818/// about whether something has a particular form (e.g. is a function type), 819/// because they implicitly, recursively, strip all typedefs out of a type. 820/// 821/// Types, once created, are immutable. 822/// 823class Type : public ExtQualsTypeCommonBase { 824public: 825 enum TypeClass { 826#define TYPE(Class, Base) Class, 827#define LAST_TYPE(Class) TypeLast = Class, 828#define ABSTRACT_TYPE(Class, Base) 829#include "clang/AST/TypeNodes.def" 830 TagFirst = Record, TagLast = Enum 831 }; 832 833private: 834 Type(const Type&); // DO NOT IMPLEMENT. 835 void operator=(const Type&); // DO NOT IMPLEMENT. 836 837 QualType CanonicalType; 838 839 /// Bitfields required by the Type class. 840 class TypeBitfields { 841 friend class Type; 842 template <class T> friend class TypePropertyCache; 843 844 /// TypeClass bitfield - Enum that specifies what subclass this belongs to. 845 unsigned TC : 8; 846 847 /// Dependent - Whether this type is a dependent type (C++ [temp.dep.type]). 848 /// Note that this should stay at the end of the ivars for Type so that 849 /// subclasses can pack their bitfields into the same word. 850 unsigned Dependent : 1; 851 852 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 853 unsigned VariablyModified : 1; 854 855 /// \brief Nonzero if the cache (i.e. the bitfields here starting 856 /// with 'Cache') is valid. If so, then this is a 857 /// LangOptions::VisibilityMode+1. 858 mutable unsigned CacheValidAndVisibility : 2; 859 860 /// \brief Linkage of this type. 861 mutable unsigned CachedLinkage : 2; 862 863 /// \brief Whether this type involves and local or unnamed types. 864 mutable unsigned CachedLocalOrUnnamed : 1; 865 866 /// \brief FromAST - Whether this type comes from an AST file. 867 mutable unsigned FromAST : 1; 868 869 bool isCacheValid() const { 870 return (CacheValidAndVisibility != 0); 871 } 872 Visibility getVisibility() const { 873 assert(isCacheValid() && "getting linkage from invalid cache"); 874 return static_cast<Visibility>(CacheValidAndVisibility-1); 875 } 876 Linkage getLinkage() const { 877 assert(isCacheValid() && "getting linkage from invalid cache"); 878 return static_cast<Linkage>(CachedLinkage); 879 } 880 bool hasLocalOrUnnamedType() const { 881 assert(isCacheValid() && "getting linkage from invalid cache"); 882 return CachedLocalOrUnnamed; 883 } 884 }; 885 enum { NumTypeBits = 16 }; 886 887protected: 888 // These classes allow subclasses to somewhat cleanly pack bitfields 889 // into Type. 890 891 class ArrayTypeBitfields { 892 friend class ArrayType; 893 894 unsigned : NumTypeBits; 895 896 /// IndexTypeQuals - CVR qualifiers from declarations like 897 /// 'int X[static restrict 4]'. For function parameters only. 898 unsigned IndexTypeQuals : 3; 899 900 /// SizeModifier - storage class qualifiers from declarations like 901 /// 'int X[static restrict 4]'. For function parameters only. 902 /// Actually an ArrayType::ArraySizeModifier. 903 unsigned SizeModifier : 3; 904 }; 905 906 class BuiltinTypeBitfields { 907 friend class BuiltinType; 908 909 unsigned : NumTypeBits; 910 911 /// The kind (BuiltinType::Kind) of builtin type this is. 912 unsigned Kind : 8; 913 }; 914 915 class FunctionTypeBitfields { 916 friend class FunctionType; 917 918 unsigned : NumTypeBits; 919 920 /// Extra information which affects how the function is called, like 921 /// regparm and the calling convention. 922 unsigned ExtInfo : 8; 923 924 /// A bit to be used by the subclass. 925 unsigned SubclassInfo : 1; 926 927 /// TypeQuals - Used only by FunctionProtoType, put here to pack with the 928 /// other bitfields. 929 /// The qualifiers are part of FunctionProtoType because... 930 /// 931 /// C++ 8.3.5p4: The return type, the parameter type list and the 932 /// cv-qualifier-seq, [...], are part of the function type. 933 unsigned TypeQuals : 3; 934 }; 935 936 class ObjCObjectTypeBitfields { 937 friend class ObjCObjectType; 938 939 unsigned : NumTypeBits; 940 941 /// NumProtocols - The number of protocols stored directly on this 942 /// object type. 943 unsigned NumProtocols : 32 - NumTypeBits; 944 }; 945 946 class ReferenceTypeBitfields { 947 friend class ReferenceType; 948 949 unsigned : NumTypeBits; 950 951 /// True if the type was originally spelled with an lvalue sigil. 952 /// This is never true of rvalue references but can also be false 953 /// on lvalue references because of C++0x [dcl.typedef]p9, 954 /// as follows: 955 /// 956 /// typedef int &ref; // lvalue, spelled lvalue 957 /// typedef int &&rvref; // rvalue 958 /// ref &a; // lvalue, inner ref, spelled lvalue 959 /// ref &&a; // lvalue, inner ref 960 /// rvref &a; // lvalue, inner ref, spelled lvalue 961 /// rvref &&a; // rvalue, inner ref 962 unsigned SpelledAsLValue : 1; 963 964 /// True if the inner type is a reference type. This only happens 965 /// in non-canonical forms. 966 unsigned InnerRef : 1; 967 }; 968 969 class TypeWithKeywordBitfields { 970 friend class TypeWithKeyword; 971 972 unsigned : NumTypeBits; 973 974 /// An ElaboratedTypeKeyword. 8 bits for efficient access. 975 unsigned Keyword : 8; 976 }; 977 978 class VectorTypeBitfields { 979 friend class VectorType; 980 981 unsigned : NumTypeBits; 982 983 /// VecKind - The kind of vector, either a generic vector type or some 984 /// target-specific vector type such as for AltiVec or Neon. 985 unsigned VecKind : 3; 986 987 /// NumElements - The number of elements in the vector. 988 unsigned NumElements : 29 - NumTypeBits; 989 }; 990 991 union { 992 TypeBitfields TypeBits; 993 ArrayTypeBitfields ArrayTypeBits; 994 BuiltinTypeBitfields BuiltinTypeBits; 995 FunctionTypeBitfields FunctionTypeBits; 996 ObjCObjectTypeBitfields ObjCObjectTypeBits; 997 ReferenceTypeBitfields ReferenceTypeBits; 998 TypeWithKeywordBitfields TypeWithKeywordBits; 999 VectorTypeBitfields VectorTypeBits; 1000 }; 1001 1002private: 1003 /// \brief Set whether this type comes from an AST file. 1004 void setFromAST(bool V = true) const { 1005 TypeBits.FromAST = V; 1006 } 1007 1008 template <class T> friend class TypePropertyCache; 1009 1010protected: 1011 // silence VC++ warning C4355: 'this' : used in base member initializer list 1012 Type *this_() { return this; } 1013 Type(TypeClass tc, QualType Canonical, bool Dependent, bool VariablyModified) 1014 : ExtQualsTypeCommonBase(this), 1015 CanonicalType(Canonical.isNull() ? QualType(this_(), 0) : Canonical) { 1016 TypeBits.TC = tc; 1017 TypeBits.Dependent = Dependent; 1018 TypeBits.VariablyModified = VariablyModified; 1019 TypeBits.CacheValidAndVisibility = 0; 1020 TypeBits.CachedLocalOrUnnamed = false; 1021 TypeBits.CachedLinkage = NoLinkage; 1022 TypeBits.FromAST = false; 1023 } 1024 friend class ASTContext; 1025 1026 void setDependent(bool D = true) { TypeBits.Dependent = D; } 1027 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } 1028 1029public: 1030 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } 1031 1032 /// \brief Whether this type comes from an AST file. 1033 bool isFromAST() const { return TypeBits.FromAST; } 1034 1035 bool isCanonicalUnqualified() const { 1036 return CanonicalType.getTypePtr() == this; 1037 } 1038 1039 /// Types are partitioned into 3 broad categories (C99 6.2.5p1): 1040 /// object types, function types, and incomplete types. 1041 1042 /// isIncompleteType - Return true if this is an incomplete type. 1043 /// A type that can describe objects, but which lacks information needed to 1044 /// determine its size (e.g. void, or a fwd declared struct). Clients of this 1045 /// routine will need to determine if the size is actually required. 1046 bool isIncompleteType() const; 1047 1048 /// isIncompleteOrObjectType - Return true if this is an incomplete or object 1049 /// type, in other words, not a function type. 1050 bool isIncompleteOrObjectType() const { 1051 return !isFunctionType(); 1052 } 1053 1054 /// isPODType - Return true if this is a plain-old-data type (C++ 3.9p10). 1055 bool isPODType() const; 1056 1057 /// isLiteralType - Return true if this is a literal type 1058 /// (C++0x [basic.types]p10) 1059 bool isLiteralType() const; 1060 1061 /// Helper methods to distinguish type categories. All type predicates 1062 /// operate on the canonical type, ignoring typedefs and qualifiers. 1063 1064 /// isBuiltinType - returns true if the type is a builtin type. 1065 bool isBuiltinType() const; 1066 1067 /// isSpecificBuiltinType - Test for a particular builtin type. 1068 bool isSpecificBuiltinType(unsigned K) const; 1069 1070 /// isPlaceholderType - Test for a type which does not represent an 1071 /// actual type-system type but is instead used as a placeholder for 1072 /// various convenient purposes within Clang. All such types are 1073 /// BuiltinTypes. 1074 bool isPlaceholderType() const; 1075 1076 /// isIntegerType() does *not* include complex integers (a GCC extension). 1077 /// isComplexIntegerType() can be used to test for complex integers. 1078 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) 1079 bool isEnumeralType() const; 1080 bool isBooleanType() const; 1081 bool isCharType() const; 1082 bool isWideCharType() const; 1083 bool isAnyCharacterType() const; 1084 bool isIntegralType(ASTContext &Ctx) const; 1085 1086 /// \brief Determine whether this type is an integral or enumeration type. 1087 bool isIntegralOrEnumerationType() const; 1088 /// \brief Determine whether this type is an integral or unscoped enumeration 1089 /// type. 1090 bool isIntegralOrUnscopedEnumerationType() const; 1091 1092 /// Floating point categories. 1093 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) 1094 /// isComplexType() does *not* include complex integers (a GCC extension). 1095 /// isComplexIntegerType() can be used to test for complex integers. 1096 bool isComplexType() const; // C99 6.2.5p11 (complex) 1097 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. 1098 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) 1099 bool isRealType() const; // C99 6.2.5p17 (real floating + integer) 1100 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) 1101 bool isVoidType() const; // C99 6.2.5p19 1102 bool isDerivedType() const; // C99 6.2.5p20 1103 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) 1104 bool isAggregateType() const; 1105 1106 // Type Predicates: Check to see if this type is structurally the specified 1107 // type, ignoring typedefs and qualifiers. 1108 bool isFunctionType() const; 1109 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } 1110 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } 1111 bool isPointerType() const; 1112 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer 1113 bool isBlockPointerType() const; 1114 bool isVoidPointerType() const; 1115 bool isReferenceType() const; 1116 bool isLValueReferenceType() const; 1117 bool isRValueReferenceType() const; 1118 bool isFunctionPointerType() const; 1119 bool isMemberPointerType() const; 1120 bool isMemberFunctionPointerType() const; 1121 bool isMemberDataPointerType() const; 1122 bool isArrayType() const; 1123 bool isConstantArrayType() const; 1124 bool isIncompleteArrayType() const; 1125 bool isVariableArrayType() const; 1126 bool isDependentSizedArrayType() const; 1127 bool isRecordType() const; 1128 bool isClassType() const; 1129 bool isStructureType() const; 1130 bool isStructureOrClassType() const; 1131 bool isUnionType() const; 1132 bool isComplexIntegerType() const; // GCC _Complex integer type. 1133 bool isVectorType() const; // GCC vector type. 1134 bool isExtVectorType() const; // Extended vector type. 1135 bool isObjCObjectPointerType() const; // Pointer to *any* ObjC object. 1136 // FIXME: change this to 'raw' interface type, so we can used 'interface' type 1137 // for the common case. 1138 bool isObjCObjectType() const; // NSString or typeof(*(id)0) 1139 bool isObjCQualifiedInterfaceType() const; // NSString<foo> 1140 bool isObjCQualifiedIdType() const; // id<foo> 1141 bool isObjCQualifiedClassType() const; // Class<foo> 1142 bool isObjCObjectOrInterfaceType() const; 1143 bool isObjCIdType() const; // id 1144 bool isObjCClassType() const; // Class 1145 bool isObjCSelType() const; // Class 1146 bool isObjCBuiltinType() const; // 'id' or 'Class' 1147 bool isTemplateTypeParmType() const; // C++ template type parameter 1148 bool isNullPtrType() const; // C++0x nullptr_t 1149 1150 enum ScalarTypeKind { 1151 STK_Pointer, 1152 STK_MemberPointer, 1153 STK_Bool, 1154 STK_Integral, 1155 STK_Floating, 1156 STK_IntegralComplex, 1157 STK_FloatingComplex 1158 }; 1159 /// getScalarTypeKind - Given that this is a scalar type, classify it. 1160 ScalarTypeKind getScalarTypeKind() const; 1161 1162 /// isDependentType - Whether this type is a dependent type, meaning 1163 /// that its definition somehow depends on a template parameter 1164 /// (C++ [temp.dep.type]). 1165 bool isDependentType() const { return TypeBits.Dependent; } 1166 1167 /// \brief Whether this type is a variably-modified type (C99 6.7.5). 1168 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } 1169 1170 /// \brief Whether this type is or contains a local or unnamed type. 1171 bool hasUnnamedOrLocalType() const; 1172 1173 bool isOverloadableType() const; 1174 1175 /// \brief Determine wither this type is a C++ elaborated-type-specifier. 1176 bool isElaboratedTypeSpecifier() const; 1177 1178 /// hasPointerRepresentation - Whether this type is represented 1179 /// natively as a pointer; this includes pointers, references, block 1180 /// pointers, and Objective-C interface, qualified id, and qualified 1181 /// interface types, as well as nullptr_t. 1182 bool hasPointerRepresentation() const; 1183 1184 /// hasObjCPointerRepresentation - Whether this type can represent 1185 /// an objective pointer type for the purpose of GC'ability 1186 bool hasObjCPointerRepresentation() const; 1187 1188 /// \brief Determine whether this type has an integer representation 1189 /// of some sort, e.g., it is an integer type or a vector. 1190 bool hasIntegerRepresentation() const; 1191 1192 /// \brief Determine whether this type has an signed integer representation 1193 /// of some sort, e.g., it is an signed integer type or a vector. 1194 bool hasSignedIntegerRepresentation() const; 1195 1196 /// \brief Determine whether this type has an unsigned integer representation 1197 /// of some sort, e.g., it is an unsigned integer type or a vector. 1198 bool hasUnsignedIntegerRepresentation() const; 1199 1200 /// \brief Determine whether this type has a floating-point representation 1201 /// of some sort, e.g., it is a floating-point type or a vector thereof. 1202 bool hasFloatingRepresentation() const; 1203 1204 // Type Checking Functions: Check to see if this type is structurally the 1205 // specified type, ignoring typedefs and qualifiers, and return a pointer to 1206 // the best type we can. 1207 const RecordType *getAsStructureType() const; 1208 /// NOTE: getAs*ArrayType are methods on ASTContext. 1209 const RecordType *getAsUnionType() const; 1210 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. 1211 // The following is a convenience method that returns an ObjCObjectPointerType 1212 // for object declared using an interface. 1213 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; 1214 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; 1215 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; 1216 const CXXRecordDecl *getCXXRecordDeclForPointerType() const; 1217 1218 /// \brief Retrieves the CXXRecordDecl that this type refers to, either 1219 /// because the type is a RecordType or because it is the injected-class-name 1220 /// type of a class template or class template partial specialization. 1221 CXXRecordDecl *getAsCXXRecordDecl() const; 1222 1223 // Member-template getAs<specific type>'. Look through sugar for 1224 // an instance of <specific type>. This scheme will eventually 1225 // replace the specific getAsXXXX methods above. 1226 // 1227 // There are some specializations of this member template listed 1228 // immediately following this class. 1229 template <typename T> const T *getAs() const; 1230 1231 /// getArrayElementTypeNoTypeQual - If this is an array type, return the 1232 /// element type of the array, potentially with type qualifiers missing. 1233 /// This method should never be used when type qualifiers are meaningful. 1234 const Type *getArrayElementTypeNoTypeQual() const; 1235 1236 /// getPointeeType - If this is a pointer, ObjC object pointer, or block 1237 /// pointer, this returns the respective pointee. 1238 QualType getPointeeType() const; 1239 1240 /// getUnqualifiedDesugaredType() - Return the specified type with 1241 /// any "sugar" removed from the type, removing any typedefs, 1242 /// typeofs, etc., as well as any qualifiers. 1243 const Type *getUnqualifiedDesugaredType() const; 1244 1245 /// More type predicates useful for type checking/promotion 1246 bool isPromotableIntegerType() const; // C99 6.3.1.1p2 1247 1248 /// isSignedIntegerType - Return true if this is an integer type that is 1249 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], 1250 /// an enum decl which has a signed representation, or a vector of signed 1251 /// integer element type. 1252 bool isSignedIntegerType() const; 1253 1254 /// isUnsignedIntegerType - Return true if this is an integer type that is 1255 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], an enum 1256 /// decl which has an unsigned representation, or a vector of unsigned integer 1257 /// element type. 1258 bool isUnsignedIntegerType() const; 1259 1260 /// isConstantSizeType - Return true if this is not a variable sized type, 1261 /// according to the rules of C99 6.7.5p3. It is not legal to call this on 1262 /// incomplete types. 1263 bool isConstantSizeType() const; 1264 1265 /// isSpecifierType - Returns true if this type can be represented by some 1266 /// set of type specifiers. 1267 bool isSpecifierType() const; 1268 1269 /// \brief Determine the linkage of this type. 1270 Linkage getLinkage() const; 1271 1272 /// \brief Determine the visibility of this type. 1273 Visibility getVisibility() const; 1274 1275 /// \brief Determine the linkage and visibility of this type. 1276 std::pair<Linkage,Visibility> getLinkageAndVisibility() const; 1277 1278 /// \brief Note that the linkage is no longer known. 1279 void ClearLinkageCache(); 1280 1281 const char *getTypeClassName() const; 1282 1283 QualType getCanonicalTypeInternal() const { 1284 return CanonicalType; 1285 } 1286 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h 1287 void dump() const; 1288 static bool classof(const Type *) { return true; } 1289 1290 friend class ASTReader; 1291 friend class ASTWriter; 1292}; 1293 1294template <> inline const TypedefType *Type::getAs() const { 1295 return dyn_cast<TypedefType>(this); 1296} 1297 1298// We can do canonical leaf types faster, because we don't have to 1299// worry about preserving child type decoration. 1300#define TYPE(Class, Base) 1301#define LEAF_TYPE(Class) \ 1302template <> inline const Class##Type *Type::getAs() const { \ 1303 return dyn_cast<Class##Type>(CanonicalType); \ 1304} 1305#include "clang/AST/TypeNodes.def" 1306 1307 1308/// BuiltinType - This class is used for builtin types like 'int'. Builtin 1309/// types are always canonical and have a literal name field. 1310class BuiltinType : public Type { 1311public: 1312 enum Kind { 1313 Void, 1314 1315 Bool, // This is bool and/or _Bool. 1316 Char_U, // This is 'char' for targets where char is unsigned. 1317 UChar, // This is explicitly qualified unsigned char. 1318 Char16, // This is 'char16_t' for C++. 1319 Char32, // This is 'char32_t' for C++. 1320 UShort, 1321 UInt, 1322 ULong, 1323 ULongLong, 1324 UInt128, // __uint128_t 1325 1326 Char_S, // This is 'char' for targets where char is signed. 1327 SChar, // This is explicitly qualified signed char. 1328 WChar, // This is 'wchar_t' for C++. 1329 Short, 1330 Int, 1331 Long, 1332 LongLong, 1333 Int128, // __int128_t 1334 1335 Float, Double, LongDouble, 1336 1337 NullPtr, // This is the type of C++0x 'nullptr'. 1338 1339 /// This represents the type of an expression whose type is 1340 /// totally unknown, e.g. 'T::foo'. It is permitted for this to 1341 /// appear in situations where the structure of the type is 1342 /// theoretically deducible. 1343 Dependent, 1344 1345 Overload, // This represents the type of an overloaded function declaration. 1346 1347 UndeducedAuto, // In C++0x, this represents the type of an auto variable 1348 // that has not been deduced yet. 1349 1350 /// The primitive Objective C 'id' type. The type pointed to by the 1351 /// user-visible 'id' type. Only ever shows up in an AST as the base 1352 /// type of an ObjCObjectType. 1353 ObjCId, 1354 1355 /// The primitive Objective C 'Class' type. The type pointed to by the 1356 /// user-visible 'Class' type. Only ever shows up in an AST as the 1357 /// base type of an ObjCObjectType. 1358 ObjCClass, 1359 1360 ObjCSel // This represents the ObjC 'SEL' type. 1361 }; 1362 1363public: 1364 BuiltinType(Kind K) 1365 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), 1366 /*VariablyModified=*/false) { 1367 BuiltinTypeBits.Kind = K; 1368 } 1369 1370 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } 1371 const char *getName(const LangOptions &LO) const; 1372 1373 bool isSugared() const { return false; } 1374 QualType desugar() const { return QualType(this, 0); } 1375 1376 bool isInteger() const { 1377 return getKind() >= Bool && getKind() <= Int128; 1378 } 1379 1380 bool isSignedInteger() const { 1381 return getKind() >= Char_S && getKind() <= Int128; 1382 } 1383 1384 bool isUnsignedInteger() const { 1385 return getKind() >= Bool && getKind() <= UInt128; 1386 } 1387 1388 bool isFloatingPoint() const { 1389 return getKind() >= Float && getKind() <= LongDouble; 1390 } 1391 1392 /// Determines whether this type is a "forbidden" placeholder type, 1393 /// i.e. a type which cannot appear in arbitrary positions in a 1394 /// fully-formed expression. 1395 bool isPlaceholderType() const { 1396 return getKind() == Overload || 1397 getKind() == UndeducedAuto; 1398 } 1399 1400 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } 1401 static bool classof(const BuiltinType *) { return true; } 1402}; 1403 1404/// ComplexType - C99 6.2.5p11 - Complex values. This supports the C99 complex 1405/// types (_Complex float etc) as well as the GCC integer complex extensions. 1406/// 1407class ComplexType : public Type, public llvm::FoldingSetNode { 1408 QualType ElementType; 1409 ComplexType(QualType Element, QualType CanonicalPtr) : 1410 Type(Complex, CanonicalPtr, Element->isDependentType(), 1411 Element->isVariablyModifiedType()), 1412 ElementType(Element) { 1413 } 1414 friend class ASTContext; // ASTContext creates these. 1415 1416public: 1417 QualType getElementType() const { return ElementType; } 1418 1419 bool isSugared() const { return false; } 1420 QualType desugar() const { return QualType(this, 0); } 1421 1422 void Profile(llvm::FoldingSetNodeID &ID) { 1423 Profile(ID, getElementType()); 1424 } 1425 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { 1426 ID.AddPointer(Element.getAsOpaquePtr()); 1427 } 1428 1429 static bool classof(const Type *T) { return T->getTypeClass() == Complex; } 1430 static bool classof(const ComplexType *) { return true; } 1431}; 1432 1433/// ParenType - Sugar for parentheses used when specifying types. 1434/// 1435class ParenType : public Type, public llvm::FoldingSetNode { 1436 QualType Inner; 1437 1438 ParenType(QualType InnerType, QualType CanonType) : 1439 Type(Paren, CanonType, InnerType->isDependentType(), 1440 InnerType->isVariablyModifiedType()), 1441 Inner(InnerType) { 1442 } 1443 friend class ASTContext; // ASTContext creates these. 1444 1445public: 1446 1447 QualType getInnerType() const { return Inner; } 1448 1449 bool isSugared() const { return true; } 1450 QualType desugar() const { return getInnerType(); } 1451 1452 void Profile(llvm::FoldingSetNodeID &ID) { 1453 Profile(ID, getInnerType()); 1454 } 1455 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { 1456 Inner.Profile(ID); 1457 } 1458 1459 static bool classof(const Type *T) { return T->getTypeClass() == Paren; } 1460 static bool classof(const ParenType *) { return true; } 1461}; 1462 1463/// PointerType - C99 6.7.5.1 - Pointer Declarators. 1464/// 1465class PointerType : public Type, public llvm::FoldingSetNode { 1466 QualType PointeeType; 1467 1468 PointerType(QualType Pointee, QualType CanonicalPtr) : 1469 Type(Pointer, CanonicalPtr, Pointee->isDependentType(), 1470 Pointee->isVariablyModifiedType()), 1471 PointeeType(Pointee) { 1472 } 1473 friend class ASTContext; // ASTContext creates these. 1474 1475public: 1476 1477 QualType getPointeeType() const { return PointeeType; } 1478 1479 bool isSugared() const { return false; } 1480 QualType desugar() const { return QualType(this, 0); } 1481 1482 void Profile(llvm::FoldingSetNodeID &ID) { 1483 Profile(ID, getPointeeType()); 1484 } 1485 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1486 ID.AddPointer(Pointee.getAsOpaquePtr()); 1487 } 1488 1489 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } 1490 static bool classof(const PointerType *) { return true; } 1491}; 1492 1493/// BlockPointerType - pointer to a block type. 1494/// This type is to represent types syntactically represented as 1495/// "void (^)(int)", etc. Pointee is required to always be a function type. 1496/// 1497class BlockPointerType : public Type, public llvm::FoldingSetNode { 1498 QualType PointeeType; // Block is some kind of pointer type 1499 BlockPointerType(QualType Pointee, QualType CanonicalCls) : 1500 Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), 1501 Pointee->isVariablyModifiedType()), 1502 PointeeType(Pointee) { 1503 } 1504 friend class ASTContext; // ASTContext creates these. 1505 1506public: 1507 1508 // Get the pointee type. Pointee is required to always be a function type. 1509 QualType getPointeeType() const { return PointeeType; } 1510 1511 bool isSugared() const { return false; } 1512 QualType desugar() const { return QualType(this, 0); } 1513 1514 void Profile(llvm::FoldingSetNodeID &ID) { 1515 Profile(ID, getPointeeType()); 1516 } 1517 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { 1518 ID.AddPointer(Pointee.getAsOpaquePtr()); 1519 } 1520 1521 static bool classof(const Type *T) { 1522 return T->getTypeClass() == BlockPointer; 1523 } 1524 static bool classof(const BlockPointerType *) { return true; } 1525}; 1526 1527/// ReferenceType - Base for LValueReferenceType and RValueReferenceType 1528/// 1529class ReferenceType : public Type, public llvm::FoldingSetNode { 1530 QualType PointeeType; 1531 1532protected: 1533 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, 1534 bool SpelledAsLValue) : 1535 Type(tc, CanonicalRef, Referencee->isDependentType(), 1536 Referencee->isVariablyModifiedType()), PointeeType(Referencee) { 1537 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; 1538 ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); 1539 } 1540 1541public: 1542 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } 1543 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } 1544 1545 QualType getPointeeTypeAsWritten() const { return PointeeType; } 1546 QualType getPointeeType() const { 1547 // FIXME: this might strip inner qualifiers; okay? 1548 const ReferenceType *T = this; 1549 while (T->isInnerRef()) 1550 T = T->PointeeType->getAs<ReferenceType>(); 1551 return T->PointeeType; 1552 } 1553 1554 void Profile(llvm::FoldingSetNodeID &ID) { 1555 Profile(ID, PointeeType, isSpelledAsLValue()); 1556 } 1557 static void Profile(llvm::FoldingSetNodeID &ID, 1558 QualType Referencee, 1559 bool SpelledAsLValue) { 1560 ID.AddPointer(Referencee.getAsOpaquePtr()); 1561 ID.AddBoolean(SpelledAsLValue); 1562 } 1563 1564 static bool classof(const Type *T) { 1565 return T->getTypeClass() == LValueReference || 1566 T->getTypeClass() == RValueReference; 1567 } 1568 static bool classof(const ReferenceType *) { return true; } 1569}; 1570 1571/// LValueReferenceType - C++ [dcl.ref] - Lvalue reference 1572/// 1573class LValueReferenceType : public ReferenceType { 1574 LValueReferenceType(QualType Referencee, QualType CanonicalRef, 1575 bool SpelledAsLValue) : 1576 ReferenceType(LValueReference, Referencee, CanonicalRef, SpelledAsLValue) 1577 {} 1578 friend class ASTContext; // ASTContext creates these 1579public: 1580 bool isSugared() const { return false; } 1581 QualType desugar() const { return QualType(this, 0); } 1582 1583 static bool classof(const Type *T) { 1584 return T->getTypeClass() == LValueReference; 1585 } 1586 static bool classof(const LValueReferenceType *) { return true; } 1587}; 1588 1589/// RValueReferenceType - C++0x [dcl.ref] - Rvalue reference 1590/// 1591class RValueReferenceType : public ReferenceType { 1592 RValueReferenceType(QualType Referencee, QualType CanonicalRef) : 1593 ReferenceType(RValueReference, Referencee, CanonicalRef, false) { 1594 } 1595 friend class ASTContext; // ASTContext creates these 1596public: 1597 bool isSugared() const { return false; } 1598 QualType desugar() const { return QualType(this, 0); } 1599 1600 static bool classof(const Type *T) { 1601 return T->getTypeClass() == RValueReference; 1602 } 1603 static bool classof(const RValueReferenceType *) { return true; } 1604}; 1605 1606/// MemberPointerType - C++ 8.3.3 - Pointers to members 1607/// 1608class MemberPointerType : public Type, public llvm::FoldingSetNode { 1609 QualType PointeeType; 1610 /// The class of which the pointee is a member. Must ultimately be a 1611 /// RecordType, but could be a typedef or a template parameter too. 1612 const Type *Class; 1613 1614 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) : 1615 Type(MemberPointer, CanonicalPtr, 1616 Cls->isDependentType() || Pointee->isDependentType(), 1617 Pointee->isVariablyModifiedType()), 1618 PointeeType(Pointee), Class(Cls) { 1619 } 1620 friend class ASTContext; // ASTContext creates these. 1621 1622public: 1623 QualType getPointeeType() const { return PointeeType; } 1624 1625 /// Returns true if the member type (i.e. the pointee type) is a 1626 /// function type rather than a data-member type. 1627 bool isMemberFunctionPointer() const { 1628 return PointeeType->isFunctionProtoType(); 1629 } 1630 1631 /// Returns true if the member type (i.e. the pointee type) is a 1632 /// data type rather than a function type. 1633 bool isMemberDataPointer() const { 1634 return !PointeeType->isFunctionProtoType(); 1635 } 1636 1637 const Type *getClass() const { return Class; } 1638 1639 bool isSugared() const { return false; } 1640 QualType desugar() const { return QualType(this, 0); } 1641 1642 void Profile(llvm::FoldingSetNodeID &ID) { 1643 Profile(ID, getPointeeType(), getClass()); 1644 } 1645 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, 1646 const Type *Class) { 1647 ID.AddPointer(Pointee.getAsOpaquePtr()); 1648 ID.AddPointer(Class); 1649 } 1650 1651 static bool classof(const Type *T) { 1652 return T->getTypeClass() == MemberPointer; 1653 } 1654 static bool classof(const MemberPointerType *) { return true; } 1655}; 1656 1657/// ArrayType - C99 6.7.5.2 - Array Declarators. 1658/// 1659class ArrayType : public Type, public llvm::FoldingSetNode { 1660public: 1661 /// ArraySizeModifier - Capture whether this is a normal array (e.g. int X[4]) 1662 /// an array with a static size (e.g. int X[static 4]), or an array 1663 /// with a star size (e.g. int X[*]). 1664 /// 'static' is only allowed on function parameters. 1665 enum ArraySizeModifier { 1666 Normal, Static, Star 1667 }; 1668private: 1669 /// ElementType - The element type of the array. 1670 QualType ElementType; 1671 1672protected: 1673 // C++ [temp.dep.type]p1: 1674 // A type is dependent if it is... 1675 // - an array type constructed from any dependent type or whose 1676 // size is specified by a constant expression that is 1677 // value-dependent, 1678 ArrayType(TypeClass tc, QualType et, QualType can, 1679 ArraySizeModifier sm, unsigned tq) 1680 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, 1681 (tc == VariableArray || et->isVariablyModifiedType())), 1682 ElementType(et) { 1683 ArrayTypeBits.IndexTypeQuals = tq; 1684 ArrayTypeBits.SizeModifier = sm; 1685 } 1686 1687 friend class ASTContext; // ASTContext creates these. 1688 1689public: 1690 QualType getElementType() const { return ElementType; } 1691 ArraySizeModifier getSizeModifier() const { 1692 return ArraySizeModifier(ArrayTypeBits.SizeModifier); 1693 } 1694 Qualifiers getIndexTypeQualifiers() const { 1695 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); 1696 } 1697 unsigned getIndexTypeCVRQualifiers() const { 1698 return ArrayTypeBits.IndexTypeQuals; 1699 } 1700 1701 static bool classof(const Type *T) { 1702 return T->getTypeClass() == ConstantArray || 1703 T->getTypeClass() == VariableArray || 1704 T->getTypeClass() == IncompleteArray || 1705 T->getTypeClass() == DependentSizedArray; 1706 } 1707 static bool classof(const ArrayType *) { return true; } 1708}; 1709 1710/// ConstantArrayType - This class represents the canonical version of 1711/// C arrays with a specified constant size. For example, the canonical 1712/// type for 'int A[4 + 4*100]' is a ConstantArrayType where the element 1713/// type is 'int' and the size is 404. 1714class ConstantArrayType : public ArrayType { 1715 llvm::APInt Size; // Allows us to unique the type. 1716 1717 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, 1718 ArraySizeModifier sm, unsigned tq) 1719 : ArrayType(ConstantArray, et, can, sm, tq), 1720 Size(size) {} 1721protected: 1722 ConstantArrayType(TypeClass tc, QualType et, QualType can, 1723 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) 1724 : ArrayType(tc, et, can, sm, tq), Size(size) {} 1725 friend class ASTContext; // ASTContext creates these. 1726public: 1727 const llvm::APInt &getSize() const { return Size; } 1728 bool isSugared() const { return false; } 1729 QualType desugar() const { return QualType(this, 0); } 1730 1731 1732 /// \brief Determine the number of bits required to address a member of 1733 // an array with the given element type and number of elements. 1734 static unsigned getNumAddressingBits(ASTContext &Context, 1735 QualType ElementType, 1736 const llvm::APInt &NumElements); 1737 1738 /// \brief Determine the maximum number of active bits that an array's size 1739 /// can require, which limits the maximum size of the array. 1740 static unsigned getMaxSizeBits(ASTContext &Context); 1741 1742 void Profile(llvm::FoldingSetNodeID &ID) { 1743 Profile(ID, getElementType(), getSize(), 1744 getSizeModifier(), getIndexTypeCVRQualifiers()); 1745 } 1746 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1747 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, 1748 unsigned TypeQuals) { 1749 ID.AddPointer(ET.getAsOpaquePtr()); 1750 ID.AddInteger(ArraySize.getZExtValue()); 1751 ID.AddInteger(SizeMod); 1752 ID.AddInteger(TypeQuals); 1753 } 1754 static bool classof(const Type *T) { 1755 return T->getTypeClass() == ConstantArray; 1756 } 1757 static bool classof(const ConstantArrayType *) { return true; } 1758}; 1759 1760/// IncompleteArrayType - This class represents C arrays with an unspecified 1761/// size. For example 'int A[]' has an IncompleteArrayType where the element 1762/// type is 'int' and the size is unspecified. 1763class IncompleteArrayType : public ArrayType { 1764 1765 IncompleteArrayType(QualType et, QualType can, 1766 ArraySizeModifier sm, unsigned tq) 1767 : ArrayType(IncompleteArray, et, can, sm, tq) {} 1768 friend class ASTContext; // ASTContext creates these. 1769public: 1770 bool isSugared() const { return false; } 1771 QualType desugar() const { return QualType(this, 0); } 1772 1773 static bool classof(const Type *T) { 1774 return T->getTypeClass() == IncompleteArray; 1775 } 1776 static bool classof(const IncompleteArrayType *) { return true; } 1777 1778 friend class StmtIteratorBase; 1779 1780 void Profile(llvm::FoldingSetNodeID &ID) { 1781 Profile(ID, getElementType(), getSizeModifier(), 1782 getIndexTypeCVRQualifiers()); 1783 } 1784 1785 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, 1786 ArraySizeModifier SizeMod, unsigned TypeQuals) { 1787 ID.AddPointer(ET.getAsOpaquePtr()); 1788 ID.AddInteger(SizeMod); 1789 ID.AddInteger(TypeQuals); 1790 } 1791}; 1792 1793/// VariableArrayType - This class represents C arrays with a specified size 1794/// which is not an integer-constant-expression. For example, 'int s[x+foo()]'. 1795/// Since the size expression is an arbitrary expression, we store it as such. 1796/// 1797/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and 1798/// should not be: two lexically equivalent variable array types could mean 1799/// different things, for example, these variables do not have the same type 1800/// dynamically: 1801/// 1802/// void foo(int x) { 1803/// int Y[x]; 1804/// ++x; 1805/// int Z[x]; 1806/// } 1807/// 1808class VariableArrayType : public ArrayType { 1809 /// SizeExpr - An assignment expression. VLA's are only permitted within 1810 /// a function block. 1811 Stmt *SizeExpr; 1812 /// Brackets - The left and right array brackets. 1813 SourceRange Brackets; 1814 1815 VariableArrayType(QualType et, QualType can, Expr *e, 1816 ArraySizeModifier sm, unsigned tq, 1817 SourceRange brackets) 1818 : ArrayType(VariableArray, et, can, sm, tq), 1819 SizeExpr((Stmt*) e), Brackets(brackets) {} 1820 friend class ASTContext; // ASTContext creates these. 1821 1822public: 1823 Expr *getSizeExpr() const { 1824 // We use C-style casts instead of cast<> here because we do not wish 1825 // to have a dependency of Type.h on Stmt.h/Expr.h. 1826 return (Expr*) SizeExpr; 1827 } 1828 SourceRange getBracketsRange() const { return Brackets; } 1829 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1830 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1831 1832 bool isSugared() const { return false; } 1833 QualType desugar() const { return QualType(this, 0); } 1834 1835 static bool classof(const Type *T) { 1836 return T->getTypeClass() == VariableArray; 1837 } 1838 static bool classof(const VariableArrayType *) { return true; } 1839 1840 friend class StmtIteratorBase; 1841 1842 void Profile(llvm::FoldingSetNodeID &ID) { 1843 assert(0 && "Cannnot unique VariableArrayTypes."); 1844 } 1845}; 1846 1847/// DependentSizedArrayType - This type represents an array type in 1848/// C++ whose size is a value-dependent expression. For example: 1849/// 1850/// \code 1851/// template<typename T, int Size> 1852/// class array { 1853/// T data[Size]; 1854/// }; 1855/// \endcode 1856/// 1857/// For these types, we won't actually know what the array bound is 1858/// until template instantiation occurs, at which point this will 1859/// become either a ConstantArrayType or a VariableArrayType. 1860class DependentSizedArrayType : public ArrayType { 1861 ASTContext &Context; 1862 1863 /// \brief An assignment expression that will instantiate to the 1864 /// size of the array. 1865 /// 1866 /// The expression itself might be NULL, in which case the array 1867 /// type will have its size deduced from an initializer. 1868 Stmt *SizeExpr; 1869 1870 /// Brackets - The left and right array brackets. 1871 SourceRange Brackets; 1872 1873 DependentSizedArrayType(ASTContext &Context, QualType et, QualType can, 1874 Expr *e, ArraySizeModifier sm, unsigned tq, 1875 SourceRange brackets) 1876 : ArrayType(DependentSizedArray, et, can, sm, tq), 1877 Context(Context), SizeExpr((Stmt*) e), Brackets(brackets) {} 1878 friend class ASTContext; // ASTContext creates these. 1879 1880public: 1881 Expr *getSizeExpr() const { 1882 // We use C-style casts instead of cast<> here because we do not wish 1883 // to have a dependency of Type.h on Stmt.h/Expr.h. 1884 return (Expr*) SizeExpr; 1885 } 1886 SourceRange getBracketsRange() const { return Brackets; } 1887 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } 1888 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } 1889 1890 bool isSugared() const { return false; } 1891 QualType desugar() const { return QualType(this, 0); } 1892 1893 static bool classof(const Type *T) { 1894 return T->getTypeClass() == DependentSizedArray; 1895 } 1896 static bool classof(const DependentSizedArrayType *) { return true; } 1897 1898 friend class StmtIteratorBase; 1899 1900 1901 void Profile(llvm::FoldingSetNodeID &ID) { 1902 Profile(ID, Context, getElementType(), 1903 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); 1904 } 1905 1906 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1907 QualType ET, ArraySizeModifier SizeMod, 1908 unsigned TypeQuals, Expr *E); 1909}; 1910 1911/// DependentSizedExtVectorType - This type represent an extended vector type 1912/// where either the type or size is dependent. For example: 1913/// @code 1914/// template<typename T, int Size> 1915/// class vector { 1916/// typedef T __attribute__((ext_vector_type(Size))) type; 1917/// } 1918/// @endcode 1919class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { 1920 ASTContext &Context; 1921 Expr *SizeExpr; 1922 /// ElementType - The element type of the array. 1923 QualType ElementType; 1924 SourceLocation loc; 1925 1926 DependentSizedExtVectorType(ASTContext &Context, QualType ElementType, 1927 QualType can, Expr *SizeExpr, SourceLocation loc) 1928 : Type(DependentSizedExtVector, can, /*Dependent=*/true, 1929 ElementType->isVariablyModifiedType()), 1930 Context(Context), SizeExpr(SizeExpr), ElementType(ElementType), 1931 loc(loc) {} 1932 friend class ASTContext; 1933 1934public: 1935 Expr *getSizeExpr() const { return SizeExpr; } 1936 QualType getElementType() const { return ElementType; } 1937 SourceLocation getAttributeLoc() const { return loc; } 1938 1939 bool isSugared() const { return false; } 1940 QualType desugar() const { return QualType(this, 0); } 1941 1942 static bool classof(const Type *T) { 1943 return T->getTypeClass() == DependentSizedExtVector; 1944 } 1945 static bool classof(const DependentSizedExtVectorType *) { return true; } 1946 1947 void Profile(llvm::FoldingSetNodeID &ID) { 1948 Profile(ID, Context, getElementType(), getSizeExpr()); 1949 } 1950 1951 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 1952 QualType ElementType, Expr *SizeExpr); 1953}; 1954 1955 1956/// VectorType - GCC generic vector type. This type is created using 1957/// __attribute__((vector_size(n)), where "n" specifies the vector size in 1958/// bytes; or from an Altivec __vector or vector declaration. 1959/// Since the constructor takes the number of vector elements, the 1960/// client is responsible for converting the size into the number of elements. 1961class VectorType : public Type, public llvm::FoldingSetNode { 1962public: 1963 enum VectorKind { 1964 GenericVector, // not a target-specific vector type 1965 AltiVecVector, // is AltiVec vector 1966 AltiVecPixel, // is AltiVec 'vector Pixel' 1967 AltiVecBool, // is AltiVec 'vector bool ...' 1968 NeonVector, // is ARM Neon vector 1969 NeonPolyVector // is ARM Neon polynomial vector 1970 }; 1971protected: 1972 /// ElementType - The element type of the vector. 1973 QualType ElementType; 1974 1975 VectorType(QualType vecType, unsigned nElements, QualType canonType, 1976 VectorKind vecKind) : 1977 Type(Vector, canonType, vecType->isDependentType(), 1978 vecType->isVariablyModifiedType()), ElementType(vecType) { 1979 VectorTypeBits.VecKind = vecKind; 1980 VectorTypeBits.NumElements = nElements; 1981 } 1982 1983 VectorType(TypeClass tc, QualType vecType, unsigned nElements, 1984 QualType canonType, VectorKind vecKind) 1985 : Type(tc, canonType, vecType->isDependentType(), 1986 vecType->isVariablyModifiedType()), ElementType(vecType) { 1987 VectorTypeBits.VecKind = vecKind; 1988 VectorTypeBits.NumElements = nElements; 1989 } 1990 friend class ASTContext; // ASTContext creates these. 1991 1992public: 1993 1994 QualType getElementType() const { return ElementType; } 1995 unsigned getNumElements() const { return VectorTypeBits.NumElements; } 1996 1997 bool isSugared() const { return false; } 1998 QualType desugar() const { return QualType(this, 0); } 1999 2000 VectorKind getVectorKind() const { 2001 return VectorKind(VectorTypeBits.VecKind); 2002 } 2003 2004 void Profile(llvm::FoldingSetNodeID &ID) { 2005 Profile(ID, getElementType(), getNumElements(), 2006 getTypeClass(), getVectorKind()); 2007 } 2008 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, 2009 unsigned NumElements, TypeClass TypeClass, 2010 VectorKind VecKind) { 2011 ID.AddPointer(ElementType.getAsOpaquePtr()); 2012 ID.AddInteger(NumElements); 2013 ID.AddInteger(TypeClass); 2014 ID.AddInteger(VecKind); 2015 } 2016 2017 static bool classof(const Type *T) { 2018 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; 2019 } 2020 static bool classof(const VectorType *) { return true; } 2021}; 2022 2023/// ExtVectorType - Extended vector type. This type is created using 2024/// __attribute__((ext_vector_type(n)), where "n" is the number of elements. 2025/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This 2026/// class enables syntactic extensions, like Vector Components for accessing 2027/// points, colors, and textures (modeled after OpenGL Shading Language). 2028class ExtVectorType : public VectorType { 2029 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) : 2030 VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} 2031 friend class ASTContext; // ASTContext creates these. 2032public: 2033 static int getPointAccessorIdx(char c) { 2034 switch (c) { 2035 default: return -1; 2036 case 'x': return 0; 2037 case 'y': return 1; 2038 case 'z': return 2; 2039 case 'w': return 3; 2040 } 2041 } 2042 static int getNumericAccessorIdx(char c) { 2043 switch (c) { 2044 default: return -1; 2045 case '0': return 0; 2046 case '1': return 1; 2047 case '2': return 2; 2048 case '3': return 3; 2049 case '4': return 4; 2050 case '5': return 5; 2051 case '6': return 6; 2052 case '7': return 7; 2053 case '8': return 8; 2054 case '9': return 9; 2055 case 'A': 2056 case 'a': return 10; 2057 case 'B': 2058 case 'b': return 11; 2059 case 'C': 2060 case 'c': return 12; 2061 case 'D': 2062 case 'd': return 13; 2063 case 'E': 2064 case 'e': return 14; 2065 case 'F': 2066 case 'f': return 15; 2067 } 2068 } 2069 2070 static int getAccessorIdx(char c) { 2071 if (int idx = getPointAccessorIdx(c)+1) return idx-1; 2072 return getNumericAccessorIdx(c); 2073 } 2074 2075 bool isAccessorWithinNumElements(char c) const { 2076 if (int idx = getAccessorIdx(c)+1) 2077 return unsigned(idx-1) < getNumElements(); 2078 return false; 2079 } 2080 bool isSugared() const { return false; } 2081 QualType desugar() const { return QualType(this, 0); } 2082 2083 static bool classof(const Type *T) { 2084 return T->getTypeClass() == ExtVector; 2085 } 2086 static bool classof(const ExtVectorType *) { return true; } 2087}; 2088 2089/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base 2090/// class of FunctionNoProtoType and FunctionProtoType. 2091/// 2092class FunctionType : public Type { 2093 // The type returned by the function. 2094 QualType ResultType; 2095 2096 public: 2097 // This class is used for passing around the information needed to 2098 // construct a call. It is not actually used for storage, just for 2099 // factoring together common arguments. 2100 // If you add a field (say Foo), other than the obvious places (both, 2101 // constructors, compile failures), what you need to update is 2102 // * Operator== 2103 // * getFoo 2104 // * withFoo 2105 // * functionType. Add Foo, getFoo. 2106 // * ASTContext::getFooType 2107 // * ASTContext::mergeFunctionTypes 2108 // * FunctionNoProtoType::Profile 2109 // * FunctionProtoType::Profile 2110 // * TypePrinter::PrintFunctionProto 2111 // * AST read and write 2112 // * Codegen 2113 2114 class ExtInfo { 2115 enum { CallConvMask = 0x7 }; 2116 enum { NoReturnMask = 0x8 }; 2117 enum { RegParmMask = ~(CallConvMask | NoReturnMask), 2118 RegParmOffset = 4 }; 2119 2120 unsigned Bits; 2121 2122 ExtInfo(unsigned Bits) : Bits(Bits) {} 2123 2124 friend class FunctionType; 2125 2126 public: 2127 // Constructor with no defaults. Use this when you know that you 2128 // have all the elements (when reading an AST file for example). 2129 ExtInfo(bool noReturn, unsigned regParm, CallingConv cc) { 2130 Bits = ((unsigned) cc) | 2131 (noReturn ? NoReturnMask : 0) | 2132 (regParm << RegParmOffset); 2133 } 2134 2135 // Constructor with all defaults. Use when for example creating a 2136 // function know to use defaults. 2137 ExtInfo() : Bits(0) {} 2138 2139 bool getNoReturn() const { return Bits & NoReturnMask; } 2140 unsigned getRegParm() const { return Bits >> RegParmOffset; } 2141 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } 2142 2143 bool operator==(ExtInfo Other) const { 2144 return Bits == Other.Bits; 2145 } 2146 bool operator!=(ExtInfo Other) const { 2147 return Bits != Other.Bits; 2148 } 2149 2150 // Note that we don't have setters. That is by design, use 2151 // the following with methods instead of mutating these objects. 2152 2153 ExtInfo withNoReturn(bool noReturn) const { 2154 if (noReturn) 2155 return ExtInfo(Bits | NoReturnMask); 2156 else 2157 return ExtInfo(Bits & ~NoReturnMask); 2158 } 2159 2160 ExtInfo withRegParm(unsigned RegParm) const { 2161 return ExtInfo((Bits & ~RegParmMask) | (RegParm << RegParmOffset)); 2162 } 2163 2164 ExtInfo withCallingConv(CallingConv cc) const { 2165 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); 2166 } 2167 2168 void Profile(llvm::FoldingSetNodeID &ID) { 2169 ID.AddInteger(Bits); 2170 } 2171 }; 2172 2173protected: 2174 FunctionType(TypeClass tc, QualType res, bool SubclassInfo, 2175 unsigned typeQuals, QualType Canonical, bool Dependent, 2176 bool VariablyModified, ExtInfo Info) 2177 : Type(tc, Canonical, Dependent, VariablyModified), ResultType(res) { 2178 FunctionTypeBits.ExtInfo = Info.Bits; 2179 FunctionTypeBits.SubclassInfo = SubclassInfo; 2180 FunctionTypeBits.TypeQuals = typeQuals; 2181 } 2182 bool getSubClassData() const { return FunctionTypeBits.SubclassInfo; } 2183 unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; } 2184public: 2185 2186 QualType getResultType() const { return ResultType; } 2187 2188 unsigned getRegParmType() const { return getExtInfo().getRegParm(); } 2189 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } 2190 CallingConv getCallConv() const { return getExtInfo().getCC(); } 2191 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } 2192 2193 /// \brief Determine the type of an expression that calls a function of 2194 /// this type. 2195 QualType getCallResultType(ASTContext &Context) const { 2196 return getResultType().getNonLValueExprType(Context); 2197 } 2198 2199 static llvm::StringRef getNameForCallConv(CallingConv CC); 2200 2201 static bool classof(const Type *T) { 2202 return T->getTypeClass() == FunctionNoProto || 2203 T->getTypeClass() == FunctionProto; 2204 } 2205 static bool classof(const FunctionType *) { return true; } 2206}; 2207 2208/// FunctionNoProtoType - Represents a K&R-style 'int foo()' function, which has 2209/// no information available about its arguments. 2210class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { 2211 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) 2212 : FunctionType(FunctionNoProto, Result, false, 0, Canonical, 2213 /*Dependent=*/false, Result->isVariablyModifiedType(), 2214 Info) {} 2215 friend class ASTContext; // ASTContext creates these. 2216 2217public: 2218 // No additional state past what FunctionType provides. 2219 2220 bool isSugared() const { return false; } 2221 QualType desugar() const { return QualType(this, 0); } 2222 2223 void Profile(llvm::FoldingSetNodeID &ID) { 2224 Profile(ID, getResultType(), getExtInfo()); 2225 } 2226 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, 2227 ExtInfo Info) { 2228 Info.Profile(ID); 2229 ID.AddPointer(ResultType.getAsOpaquePtr()); 2230 } 2231 2232 static bool classof(const Type *T) { 2233 return T->getTypeClass() == FunctionNoProto; 2234 } 2235 static bool classof(const FunctionNoProtoType *) { return true; } 2236}; 2237 2238/// FunctionProtoType - Represents a prototype with argument type info, e.g. 2239/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no 2240/// arguments, not as having a single void argument. Such a type can have an 2241/// exception specification, but this specification is not part of the canonical 2242/// type. 2243class FunctionProtoType : public FunctionType, public llvm::FoldingSetNode { 2244 FunctionProtoType(QualType Result, const QualType *ArgArray, unsigned numArgs, 2245 bool isVariadic, unsigned typeQuals, bool hasExs, 2246 bool hasAnyExs, const QualType *ExArray, 2247 unsigned numExs, QualType Canonical, 2248 const ExtInfo &Info); 2249 2250 /// NumArgs - The number of arguments this function has, not counting '...'. 2251 unsigned NumArgs : 20; 2252 2253 /// NumExceptions - The number of types in the exception spec, if any. 2254 unsigned NumExceptions : 10; 2255 2256 /// HasExceptionSpec - Whether this function has an exception spec at all. 2257 unsigned HasExceptionSpec : 1; 2258 2259 /// AnyExceptionSpec - Whether this function has a throw(...) spec. 2260 unsigned AnyExceptionSpec : 1; 2261 2262 /// ArgInfo - There is an variable size array after the class in memory that 2263 /// holds the argument types. 2264 2265 /// Exceptions - There is another variable size array after ArgInfo that 2266 /// holds the exception types. 2267 2268 friend class ASTContext; // ASTContext creates these. 2269 2270public: 2271 unsigned getNumArgs() const { return NumArgs; } 2272 QualType getArgType(unsigned i) const { 2273 assert(i < NumArgs && "Invalid argument number!"); 2274 return arg_type_begin()[i]; 2275 } 2276 2277 bool hasExceptionSpec() const { return HasExceptionSpec; } 2278 bool hasAnyExceptionSpec() const { return AnyExceptionSpec; } 2279 unsigned getNumExceptions() const { return NumExceptions; } 2280 QualType getExceptionType(unsigned i) const { 2281 assert(i < NumExceptions && "Invalid exception number!"); 2282 return exception_begin()[i]; 2283 } 2284 bool hasEmptyExceptionSpec() const { 2285 return hasExceptionSpec() && !hasAnyExceptionSpec() && 2286 getNumExceptions() == 0; 2287 } 2288 2289 bool isVariadic() const { return getSubClassData(); } 2290 unsigned getTypeQuals() const { return FunctionType::getTypeQuals(); } 2291 2292 typedef const QualType *arg_type_iterator; 2293 arg_type_iterator arg_type_begin() const { 2294 return reinterpret_cast<const QualType *>(this+1); 2295 } 2296 arg_type_iterator arg_type_end() const { return arg_type_begin()+NumArgs; } 2297 2298 typedef const QualType *exception_iterator; 2299 exception_iterator exception_begin() const { 2300 // exceptions begin where arguments end 2301 return arg_type_end(); 2302 } 2303 exception_iterator exception_end() const { 2304 return exception_begin() + NumExceptions; 2305 } 2306 2307 bool isSugared() const { return false; } 2308 QualType desugar() const { return QualType(this, 0); } 2309 2310 static bool classof(const Type *T) { 2311 return T->getTypeClass() == FunctionProto; 2312 } 2313 static bool classof(const FunctionProtoType *) { return true; } 2314 2315 void Profile(llvm::FoldingSetNodeID &ID); 2316 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, 2317 arg_type_iterator ArgTys, unsigned NumArgs, 2318 bool isVariadic, unsigned TypeQuals, 2319 bool hasExceptionSpec, bool anyExceptionSpec, 2320 unsigned NumExceptions, exception_iterator Exs, 2321 ExtInfo ExtInfo); 2322}; 2323 2324 2325/// \brief Represents the dependent type named by a dependently-scoped 2326/// typename using declaration, e.g. 2327/// using typename Base<T>::foo; 2328/// Template instantiation turns these into the underlying type. 2329class UnresolvedUsingType : public Type { 2330 UnresolvedUsingTypenameDecl *Decl; 2331 2332 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) 2333 : Type(UnresolvedUsing, QualType(), true, false), 2334 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} 2335 friend class ASTContext; // ASTContext creates these. 2336public: 2337 2338 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } 2339 2340 bool isSugared() const { return false; } 2341 QualType desugar() const { return QualType(this, 0); } 2342 2343 static bool classof(const Type *T) { 2344 return T->getTypeClass() == UnresolvedUsing; 2345 } 2346 static bool classof(const UnresolvedUsingType *) { return true; } 2347 2348 void Profile(llvm::FoldingSetNodeID &ID) { 2349 return Profile(ID, Decl); 2350 } 2351 static void Profile(llvm::FoldingSetNodeID &ID, 2352 UnresolvedUsingTypenameDecl *D) { 2353 ID.AddPointer(D); 2354 } 2355}; 2356 2357 2358class TypedefType : public Type { 2359 TypedefDecl *Decl; 2360protected: 2361 TypedefType(TypeClass tc, const TypedefDecl *D, QualType can) 2362 : Type(tc, can, can->isDependentType(), can->isVariablyModifiedType()), 2363 Decl(const_cast<TypedefDecl*>(D)) { 2364 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2365 } 2366 friend class ASTContext; // ASTContext creates these. 2367public: 2368 2369 TypedefDecl *getDecl() const { return Decl; } 2370 2371 bool isSugared() const { return true; } 2372 QualType desugar() const; 2373 2374 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } 2375 static bool classof(const TypedefType *) { return true; } 2376}; 2377 2378/// TypeOfExprType (GCC extension). 2379class TypeOfExprType : public Type { 2380 Expr *TOExpr; 2381 2382protected: 2383 TypeOfExprType(Expr *E, QualType can = QualType()); 2384 friend class ASTContext; // ASTContext creates these. 2385public: 2386 Expr *getUnderlyingExpr() const { return TOExpr; } 2387 2388 /// \brief Remove a single level of sugar. 2389 QualType desugar() const; 2390 2391 /// \brief Returns whether this type directly provides sugar. 2392 bool isSugared() const { return true; } 2393 2394 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } 2395 static bool classof(const TypeOfExprType *) { return true; } 2396}; 2397 2398/// \brief Internal representation of canonical, dependent 2399/// typeof(expr) types. 2400/// 2401/// This class is used internally by the ASTContext to manage 2402/// canonical, dependent types, only. Clients will only see instances 2403/// of this class via TypeOfExprType nodes. 2404class DependentTypeOfExprType 2405 : public TypeOfExprType, public llvm::FoldingSetNode { 2406 ASTContext &Context; 2407 2408public: 2409 DependentTypeOfExprType(ASTContext &Context, Expr *E) 2410 : TypeOfExprType(E), Context(Context) { } 2411 2412 bool isSugared() const { return false; } 2413 QualType desugar() const { return QualType(this, 0); } 2414 2415 void Profile(llvm::FoldingSetNodeID &ID) { 2416 Profile(ID, Context, getUnderlyingExpr()); 2417 } 2418 2419 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2420 Expr *E); 2421}; 2422 2423/// TypeOfType (GCC extension). 2424class TypeOfType : public Type { 2425 QualType TOType; 2426 TypeOfType(QualType T, QualType can) 2427 : Type(TypeOf, can, T->isDependentType(), T->isVariablyModifiedType()), 2428 TOType(T) { 2429 assert(!isa<TypedefType>(can) && "Invalid canonical type"); 2430 } 2431 friend class ASTContext; // ASTContext creates these. 2432public: 2433 QualType getUnderlyingType() const { return TOType; } 2434 2435 /// \brief Remove a single level of sugar. 2436 QualType desugar() const { return getUnderlyingType(); } 2437 2438 /// \brief Returns whether this type directly provides sugar. 2439 bool isSugared() const { return true; } 2440 2441 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } 2442 static bool classof(const TypeOfType *) { return true; } 2443}; 2444 2445/// DecltypeType (C++0x) 2446class DecltypeType : public Type { 2447 Expr *E; 2448 2449 // FIXME: We could get rid of UnderlyingType if we wanted to: We would have to 2450 // Move getDesugaredType to ASTContext so that it can call getDecltypeForExpr 2451 // from it. 2452 QualType UnderlyingType; 2453 2454protected: 2455 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); 2456 friend class ASTContext; // ASTContext creates these. 2457public: 2458 Expr *getUnderlyingExpr() const { return E; } 2459 QualType getUnderlyingType() const { return UnderlyingType; } 2460 2461 /// \brief Remove a single level of sugar. 2462 QualType desugar() const { return getUnderlyingType(); } 2463 2464 /// \brief Returns whether this type directly provides sugar. 2465 bool isSugared() const { return !isDependentType(); } 2466 2467 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } 2468 static bool classof(const DecltypeType *) { return true; } 2469}; 2470 2471/// \brief Internal representation of canonical, dependent 2472/// decltype(expr) types. 2473/// 2474/// This class is used internally by the ASTContext to manage 2475/// canonical, dependent types, only. Clients will only see instances 2476/// of this class via DecltypeType nodes. 2477class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { 2478 ASTContext &Context; 2479 2480public: 2481 DependentDecltypeType(ASTContext &Context, Expr *E); 2482 2483 bool isSugared() const { return false; } 2484 QualType desugar() const { return QualType(this, 0); } 2485 2486 void Profile(llvm::FoldingSetNodeID &ID) { 2487 Profile(ID, Context, getUnderlyingExpr()); 2488 } 2489 2490 static void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 2491 Expr *E); 2492}; 2493 2494class TagType : public Type { 2495 /// Stores the TagDecl associated with this type. The decl may point to any 2496 /// TagDecl that declares the entity. 2497 TagDecl * decl; 2498 2499protected: 2500 TagType(TypeClass TC, const TagDecl *D, QualType can); 2501 2502public: 2503 TagDecl *getDecl() const; 2504 2505 /// @brief Determines whether this type is in the process of being 2506 /// defined. 2507 bool isBeingDefined() const; 2508 2509 static bool classof(const Type *T) { 2510 return T->getTypeClass() >= TagFirst && T->getTypeClass() <= TagLast; 2511 } 2512 static bool classof(const TagType *) { return true; } 2513 static bool classof(const RecordType *) { return true; } 2514 static bool classof(const EnumType *) { return true; } 2515}; 2516 2517/// RecordType - This is a helper class that allows the use of isa/cast/dyncast 2518/// to detect TagType objects of structs/unions/classes. 2519class RecordType : public TagType { 2520protected: 2521 explicit RecordType(const RecordDecl *D) 2522 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2523 explicit RecordType(TypeClass TC, RecordDecl *D) 2524 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2525 friend class ASTContext; // ASTContext creates these. 2526public: 2527 2528 RecordDecl *getDecl() const { 2529 return reinterpret_cast<RecordDecl*>(TagType::getDecl()); 2530 } 2531 2532 // FIXME: This predicate is a helper to QualType/Type. It needs to 2533 // recursively check all fields for const-ness. If any field is declared 2534 // const, it needs to return false. 2535 bool hasConstFields() const { return false; } 2536 2537 // FIXME: RecordType needs to check when it is created that all fields are in 2538 // the same address space, and return that. 2539 unsigned getAddressSpace() const { return 0; } 2540 2541 bool isSugared() const { return false; } 2542 QualType desugar() const { return QualType(this, 0); } 2543 2544 static bool classof(const TagType *T); 2545 static bool classof(const Type *T) { 2546 return isa<TagType>(T) && classof(cast<TagType>(T)); 2547 } 2548 static bool classof(const RecordType *) { return true; } 2549}; 2550 2551/// EnumType - This is a helper class that allows the use of isa/cast/dyncast 2552/// to detect TagType objects of enums. 2553class EnumType : public TagType { 2554 explicit EnumType(const EnumDecl *D) 2555 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) { } 2556 friend class ASTContext; // ASTContext creates these. 2557public: 2558 2559 EnumDecl *getDecl() const { 2560 return reinterpret_cast<EnumDecl*>(TagType::getDecl()); 2561 } 2562 2563 bool isSugared() const { return false; } 2564 QualType desugar() const { return QualType(this, 0); } 2565 2566 static bool classof(const TagType *T); 2567 static bool classof(const Type *T) { 2568 return isa<TagType>(T) && classof(cast<TagType>(T)); 2569 } 2570 static bool classof(const EnumType *) { return true; } 2571}; 2572 2573class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2574 unsigned Depth : 15; 2575 unsigned ParameterPack : 1; 2576 unsigned Index : 16; 2577 IdentifierInfo *Name; 2578 2579 TemplateTypeParmType(unsigned D, unsigned I, bool PP, IdentifierInfo *N, 2580 QualType Canon) 2581 : Type(TemplateTypeParm, Canon, /*Dependent=*/true, 2582 /*VariablyModified=*/false), 2583 Depth(D), ParameterPack(PP), Index(I), Name(N) { } 2584 2585 TemplateTypeParmType(unsigned D, unsigned I, bool PP) 2586 : Type(TemplateTypeParm, QualType(this, 0), /*Dependent=*/true, 2587 /*VariablyModified=*/false), 2588 Depth(D), ParameterPack(PP), Index(I), Name(0) { } 2589 2590 friend class ASTContext; // ASTContext creates these 2591 2592public: 2593 unsigned getDepth() const { return Depth; } 2594 unsigned getIndex() const { return Index; } 2595 bool isParameterPack() const { return ParameterPack; } 2596 IdentifierInfo *getName() const { return Name; } 2597 2598 bool isSugared() const { return false; } 2599 QualType desugar() const { return QualType(this, 0); } 2600 2601 void Profile(llvm::FoldingSetNodeID &ID) { 2602 Profile(ID, Depth, Index, ParameterPack, Name); 2603 } 2604 2605 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, 2606 unsigned Index, bool ParameterPack, 2607 IdentifierInfo *Name) { 2608 ID.AddInteger(Depth); 2609 ID.AddInteger(Index); 2610 ID.AddBoolean(ParameterPack); 2611 ID.AddPointer(Name); 2612 } 2613 2614 static bool classof(const Type *T) { 2615 return T->getTypeClass() == TemplateTypeParm; 2616 } 2617 static bool classof(const TemplateTypeParmType *T) { return true; } 2618}; 2619 2620/// \brief Represents the result of substituting a type for a template 2621/// type parameter. 2622/// 2623/// Within an instantiated template, all template type parameters have 2624/// been replaced with these. They are used solely to record that a 2625/// type was originally written as a template type parameter; 2626/// therefore they are never canonical. 2627class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { 2628 // The original type parameter. 2629 const TemplateTypeParmType *Replaced; 2630 2631 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) 2632 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), 2633 Canon->isVariablyModifiedType()), 2634 Replaced(Param) { } 2635 2636 friend class ASTContext; 2637 2638public: 2639 IdentifierInfo *getName() const { return Replaced->getName(); } 2640 2641 /// Gets the template parameter that was substituted for. 2642 const TemplateTypeParmType *getReplacedParameter() const { 2643 return Replaced; 2644 } 2645 2646 /// Gets the type that was substituted for the template 2647 /// parameter. 2648 QualType getReplacementType() const { 2649 return getCanonicalTypeInternal(); 2650 } 2651 2652 bool isSugared() const { return true; } 2653 QualType desugar() const { return getReplacementType(); } 2654 2655 void Profile(llvm::FoldingSetNodeID &ID) { 2656 Profile(ID, getReplacedParameter(), getReplacementType()); 2657 } 2658 static void Profile(llvm::FoldingSetNodeID &ID, 2659 const TemplateTypeParmType *Replaced, 2660 QualType Replacement) { 2661 ID.AddPointer(Replaced); 2662 ID.AddPointer(Replacement.getAsOpaquePtr()); 2663 } 2664 2665 static bool classof(const Type *T) { 2666 return T->getTypeClass() == SubstTemplateTypeParm; 2667 } 2668 static bool classof(const SubstTemplateTypeParmType *T) { return true; } 2669}; 2670 2671/// \brief Represents the type of a template specialization as written 2672/// in the source code. 2673/// 2674/// Template specialization types represent the syntactic form of a 2675/// template-id that refers to a type, e.g., @c vector<int>. Some 2676/// template specialization types are syntactic sugar, whose canonical 2677/// type will point to some other type node that represents the 2678/// instantiation or class template specialization. For example, a 2679/// class template specialization type of @c vector<int> will refer to 2680/// a tag type for the instantiation 2681/// @c std::vector<int, std::allocator<int>>. 2682/// 2683/// Other template specialization types, for which the template name 2684/// is dependent, may be canonical types. These types are always 2685/// dependent. 2686class TemplateSpecializationType 2687 : public Type, public llvm::FoldingSetNode { 2688 /// \brief The name of the template being specialized. 2689 TemplateName Template; 2690 2691 /// \brief - The number of template arguments named in this class 2692 /// template specialization. 2693 unsigned NumArgs; 2694 2695 TemplateSpecializationType(TemplateName T, 2696 const TemplateArgument *Args, 2697 unsigned NumArgs, QualType Canon); 2698 2699 friend class ASTContext; // ASTContext creates these 2700 2701public: 2702 /// \brief Determine whether any of the given template arguments are 2703 /// dependent. 2704 static bool anyDependentTemplateArguments(const TemplateArgument *Args, 2705 unsigned NumArgs); 2706 2707 static bool anyDependentTemplateArguments(const TemplateArgumentLoc *Args, 2708 unsigned NumArgs); 2709 2710 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &); 2711 2712 /// \brief Print a template argument list, including the '<' and '>' 2713 /// enclosing the template arguments. 2714 static std::string PrintTemplateArgumentList(const TemplateArgument *Args, 2715 unsigned NumArgs, 2716 const PrintingPolicy &Policy); 2717 2718 static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args, 2719 unsigned NumArgs, 2720 const PrintingPolicy &Policy); 2721 2722 static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &, 2723 const PrintingPolicy &Policy); 2724 2725 /// True if this template specialization type matches a current 2726 /// instantiation in the context in which it is found. 2727 bool isCurrentInstantiation() const { 2728 return isa<InjectedClassNameType>(getCanonicalTypeInternal()); 2729 } 2730 2731 typedef const TemplateArgument * iterator; 2732 2733 iterator begin() const { return getArgs(); } 2734 iterator end() const; // defined inline in TemplateBase.h 2735 2736 /// \brief Retrieve the name of the template that we are specializing. 2737 TemplateName getTemplateName() const { return Template; } 2738 2739 /// \brief Retrieve the template arguments. 2740 const TemplateArgument *getArgs() const { 2741 return reinterpret_cast<const TemplateArgument *>(this + 1); 2742 } 2743 2744 /// \brief Retrieve the number of template arguments. 2745 unsigned getNumArgs() const { return NumArgs; } 2746 2747 /// \brief Retrieve a specific template argument as a type. 2748 /// \precondition @c isArgType(Arg) 2749 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 2750 2751 bool isSugared() const { 2752 return !isDependentType() || isCurrentInstantiation(); 2753 } 2754 QualType desugar() const { return getCanonicalTypeInternal(); } 2755 2756 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Ctx) { 2757 Profile(ID, Template, getArgs(), NumArgs, Ctx); 2758 } 2759 2760 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, 2761 const TemplateArgument *Args, 2762 unsigned NumArgs, 2763 ASTContext &Context); 2764 2765 static bool classof(const Type *T) { 2766 return T->getTypeClass() == TemplateSpecialization; 2767 } 2768 static bool classof(const TemplateSpecializationType *T) { return true; } 2769}; 2770 2771/// \brief The injected class name of a C++ class template or class 2772/// template partial specialization. Used to record that a type was 2773/// spelled with a bare identifier rather than as a template-id; the 2774/// equivalent for non-templated classes is just RecordType. 2775/// 2776/// Injected class name types are always dependent. Template 2777/// instantiation turns these into RecordTypes. 2778/// 2779/// Injected class name types are always canonical. This works 2780/// because it is impossible to compare an injected class name type 2781/// with the corresponding non-injected template type, for the same 2782/// reason that it is impossible to directly compare template 2783/// parameters from different dependent contexts: injected class name 2784/// types can only occur within the scope of a particular templated 2785/// declaration, and within that scope every template specialization 2786/// will canonicalize to the injected class name (when appropriate 2787/// according to the rules of the language). 2788class InjectedClassNameType : public Type { 2789 CXXRecordDecl *Decl; 2790 2791 /// The template specialization which this type represents. 2792 /// For example, in 2793 /// template <class T> class A { ... }; 2794 /// this is A<T>, whereas in 2795 /// template <class X, class Y> class A<B<X,Y> > { ... }; 2796 /// this is A<B<X,Y> >. 2797 /// 2798 /// It is always unqualified, always a template specialization type, 2799 /// and always dependent. 2800 QualType InjectedType; 2801 2802 friend class ASTContext; // ASTContext creates these. 2803 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not 2804 // currently suitable for AST reading, too much 2805 // interdependencies. 2806 InjectedClassNameType(CXXRecordDecl *D, QualType TST) 2807 : Type(InjectedClassName, QualType(), /*Dependent=*/true, 2808 /*VariablyModified=*/false), 2809 Decl(D), InjectedType(TST) { 2810 assert(isa<TemplateSpecializationType>(TST)); 2811 assert(!TST.hasQualifiers()); 2812 assert(TST->isDependentType()); 2813 } 2814 2815public: 2816 QualType getInjectedSpecializationType() const { return InjectedType; } 2817 const TemplateSpecializationType *getInjectedTST() const { 2818 return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); 2819 } 2820 2821 CXXRecordDecl *getDecl() const; 2822 2823 bool isSugared() const { return false; } 2824 QualType desugar() const { return QualType(this, 0); } 2825 2826 static bool classof(const Type *T) { 2827 return T->getTypeClass() == InjectedClassName; 2828 } 2829 static bool classof(const InjectedClassNameType *T) { return true; } 2830}; 2831 2832/// \brief The kind of a tag type. 2833enum TagTypeKind { 2834 /// \brief The "struct" keyword. 2835 TTK_Struct, 2836 /// \brief The "union" keyword. 2837 TTK_Union, 2838 /// \brief The "class" keyword. 2839 TTK_Class, 2840 /// \brief The "enum" keyword. 2841 TTK_Enum 2842}; 2843 2844/// \brief The elaboration keyword that precedes a qualified type name or 2845/// introduces an elaborated-type-specifier. 2846enum ElaboratedTypeKeyword { 2847 /// \brief The "struct" keyword introduces the elaborated-type-specifier. 2848 ETK_Struct, 2849 /// \brief The "union" keyword introduces the elaborated-type-specifier. 2850 ETK_Union, 2851 /// \brief The "class" keyword introduces the elaborated-type-specifier. 2852 ETK_Class, 2853 /// \brief The "enum" keyword introduces the elaborated-type-specifier. 2854 ETK_Enum, 2855 /// \brief The "typename" keyword precedes the qualified type name, e.g., 2856 /// \c typename T::type. 2857 ETK_Typename, 2858 /// \brief No keyword precedes the qualified type name. 2859 ETK_None 2860}; 2861 2862/// A helper class for Type nodes having an ElaboratedTypeKeyword. 2863/// The keyword in stored in the free bits of the base class. 2864/// Also provides a few static helpers for converting and printing 2865/// elaborated type keyword and tag type kind enumerations. 2866class TypeWithKeyword : public Type { 2867protected: 2868 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, 2869 QualType Canonical, bool Dependent, bool VariablyModified) 2870 : Type(tc, Canonical, Dependent, VariablyModified) { 2871 TypeWithKeywordBits.Keyword = Keyword; 2872 } 2873 2874public: 2875 ElaboratedTypeKeyword getKeyword() const { 2876 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); 2877 } 2878 2879 /// getKeywordForTypeSpec - Converts a type specifier (DeclSpec::TST) 2880 /// into an elaborated type keyword. 2881 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); 2882 2883 /// getTagTypeKindForTypeSpec - Converts a type specifier (DeclSpec::TST) 2884 /// into a tag type kind. It is an error to provide a type specifier 2885 /// which *isn't* a tag kind here. 2886 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); 2887 2888 /// getKeywordForTagDeclKind - Converts a TagTypeKind into an 2889 /// elaborated type keyword. 2890 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); 2891 2892 /// getTagTypeKindForKeyword - Converts an elaborated type keyword into 2893 // a TagTypeKind. It is an error to provide an elaborated type keyword 2894 /// which *isn't* a tag kind here. 2895 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); 2896 2897 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); 2898 2899 static const char *getKeywordName(ElaboratedTypeKeyword Keyword); 2900 2901 static const char *getTagTypeKindName(TagTypeKind Kind) { 2902 return getKeywordName(getKeywordForTagTypeKind(Kind)); 2903 } 2904 2905 class CannotCastToThisType {}; 2906 static CannotCastToThisType classof(const Type *); 2907}; 2908 2909/// \brief Represents a type that was referred to using an elaborated type 2910/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, 2911/// or both. 2912/// 2913/// This type is used to keep track of a type name as written in the 2914/// source code, including tag keywords and any nested-name-specifiers. 2915/// The type itself is always "sugar", used to express what was written 2916/// in the source code but containing no additional semantic information. 2917class ElaboratedType : public TypeWithKeyword, public llvm::FoldingSetNode { 2918 2919 /// \brief The nested name specifier containing the qualifier. 2920 NestedNameSpecifier *NNS; 2921 2922 /// \brief The type that this qualified name refers to. 2923 QualType NamedType; 2924 2925 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2926 QualType NamedType, QualType CanonType) 2927 : TypeWithKeyword(Keyword, Elaborated, CanonType, 2928 NamedType->isDependentType(), 2929 NamedType->isVariablyModifiedType()), 2930 NNS(NNS), NamedType(NamedType) { 2931 assert(!(Keyword == ETK_None && NNS == 0) && 2932 "ElaboratedType cannot have elaborated type keyword " 2933 "and name qualifier both null."); 2934 } 2935 2936 friend class ASTContext; // ASTContext creates these 2937 2938public: 2939 ~ElaboratedType(); 2940 2941 /// \brief Retrieve the qualification on this type. 2942 NestedNameSpecifier *getQualifier() const { return NNS; } 2943 2944 /// \brief Retrieve the type named by the qualified-id. 2945 QualType getNamedType() const { return NamedType; } 2946 2947 /// \brief Remove a single level of sugar. 2948 QualType desugar() const { return getNamedType(); } 2949 2950 /// \brief Returns whether this type directly provides sugar. 2951 bool isSugared() const { return true; } 2952 2953 void Profile(llvm::FoldingSetNodeID &ID) { 2954 Profile(ID, getKeyword(), NNS, NamedType); 2955 } 2956 2957 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 2958 NestedNameSpecifier *NNS, QualType NamedType) { 2959 ID.AddInteger(Keyword); 2960 ID.AddPointer(NNS); 2961 NamedType.Profile(ID); 2962 } 2963 2964 static bool classof(const Type *T) { 2965 return T->getTypeClass() == Elaborated; 2966 } 2967 static bool classof(const ElaboratedType *T) { return true; } 2968}; 2969 2970/// \brief Represents a qualified type name for which the type name is 2971/// dependent. 2972/// 2973/// DependentNameType represents a class of dependent types that involve a 2974/// dependent nested-name-specifier (e.g., "T::") followed by a (dependent) 2975/// name of a type. The DependentNameType may start with a "typename" (for a 2976/// typename-specifier), "class", "struct", "union", or "enum" (for a 2977/// dependent elaborated-type-specifier), or nothing (in contexts where we 2978/// know that we must be referring to a type, e.g., in a base class specifier). 2979class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { 2980 2981 /// \brief The nested name specifier containing the qualifier. 2982 NestedNameSpecifier *NNS; 2983 2984 /// \brief The type that this typename specifier refers to. 2985 const IdentifierInfo *Name; 2986 2987 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, 2988 const IdentifierInfo *Name, QualType CanonType) 2989 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, 2990 /*VariablyModified=*/false), 2991 NNS(NNS), Name(Name) { 2992 assert(NNS->isDependent() && 2993 "DependentNameType requires a dependent nested-name-specifier"); 2994 } 2995 2996 friend class ASTContext; // ASTContext creates these 2997 2998public: 2999 /// \brief Retrieve the qualification on this type. 3000 NestedNameSpecifier *getQualifier() const { return NNS; } 3001 3002 /// \brief Retrieve the type named by the typename specifier as an 3003 /// identifier. 3004 /// 3005 /// This routine will return a non-NULL identifier pointer when the 3006 /// form of the original typename was terminated by an identifier, 3007 /// e.g., "typename T::type". 3008 const IdentifierInfo *getIdentifier() const { 3009 return Name; 3010 } 3011 3012 bool isSugared() const { return false; } 3013 QualType desugar() const { return QualType(this, 0); } 3014 3015 void Profile(llvm::FoldingSetNodeID &ID) { 3016 Profile(ID, getKeyword(), NNS, Name); 3017 } 3018 3019 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, 3020 NestedNameSpecifier *NNS, const IdentifierInfo *Name) { 3021 ID.AddInteger(Keyword); 3022 ID.AddPointer(NNS); 3023 ID.AddPointer(Name); 3024 } 3025 3026 static bool classof(const Type *T) { 3027 return T->getTypeClass() == DependentName; 3028 } 3029 static bool classof(const DependentNameType *T) { return true; } 3030}; 3031 3032/// DependentTemplateSpecializationType - Represents a template 3033/// specialization type whose template cannot be resolved, e.g. 3034/// A<T>::template B<T> 3035class DependentTemplateSpecializationType : 3036 public TypeWithKeyword, public llvm::FoldingSetNode { 3037 3038 /// \brief The nested name specifier containing the qualifier. 3039 NestedNameSpecifier *NNS; 3040 3041 /// \brief The identifier of the template. 3042 const IdentifierInfo *Name; 3043 3044 /// \brief - The number of template arguments named in this class 3045 /// template specialization. 3046 unsigned NumArgs; 3047 3048 const TemplateArgument *getArgBuffer() const { 3049 return reinterpret_cast<const TemplateArgument*>(this+1); 3050 } 3051 TemplateArgument *getArgBuffer() { 3052 return reinterpret_cast<TemplateArgument*>(this+1); 3053 } 3054 3055 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, 3056 NestedNameSpecifier *NNS, 3057 const IdentifierInfo *Name, 3058 unsigned NumArgs, 3059 const TemplateArgument *Args, 3060 QualType Canon); 3061 3062 friend class ASTContext; // ASTContext creates these 3063 3064public: 3065 NestedNameSpecifier *getQualifier() const { return NNS; } 3066 const IdentifierInfo *getIdentifier() const { return Name; } 3067 3068 /// \brief Retrieve the template arguments. 3069 const TemplateArgument *getArgs() const { 3070 return getArgBuffer(); 3071 } 3072 3073 /// \brief Retrieve the number of template arguments. 3074 unsigned getNumArgs() const { return NumArgs; } 3075 3076 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h 3077 3078 typedef const TemplateArgument * iterator; 3079 iterator begin() const { return getArgs(); } 3080 iterator end() const; // inline in TemplateBase.h 3081 3082 bool isSugared() const { return false; } 3083 QualType desugar() const { return QualType(this, 0); } 3084 3085 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context) { 3086 Profile(ID, Context, getKeyword(), NNS, Name, NumArgs, getArgs()); 3087 } 3088 3089 static void Profile(llvm::FoldingSetNodeID &ID, 3090 ASTContext &Context, 3091 ElaboratedTypeKeyword Keyword, 3092 NestedNameSpecifier *Qualifier, 3093 const IdentifierInfo *Name, 3094 unsigned NumArgs, 3095 const TemplateArgument *Args); 3096 3097 static bool classof(const Type *T) { 3098 return T->getTypeClass() == DependentTemplateSpecialization; 3099 } 3100 static bool classof(const DependentTemplateSpecializationType *T) { 3101 return true; 3102 } 3103}; 3104 3105/// ObjCObjectType - Represents a class type in Objective C. 3106/// Every Objective C type is a combination of a base type and a 3107/// list of protocols. 3108/// 3109/// Given the following declarations: 3110/// @class C; 3111/// @protocol P; 3112/// 3113/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType 3114/// with base C and no protocols. 3115/// 3116/// 'C<P>' is an ObjCObjectType with base C and protocol list [P]. 3117/// 3118/// 'id' is a TypedefType which is sugar for an ObjCPointerType whose 3119/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType 3120/// and no protocols. 3121/// 3122/// 'id<P>' is an ObjCPointerType whose pointee is an ObjCObjecType 3123/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually 3124/// this should get its own sugar class to better represent the source. 3125class ObjCObjectType : public Type { 3126 // ObjCObjectType.NumProtocols - the number of protocols stored 3127 // after the ObjCObjectPointerType node. 3128 // 3129 // These protocols are those written directly on the type. If 3130 // protocol qualifiers ever become additive, the iterators will need 3131 // to get kindof complicated. 3132 // 3133 // In the canonical object type, these are sorted alphabetically 3134 // and uniqued. 3135 3136 /// Either a BuiltinType or an InterfaceType or sugar for either. 3137 QualType BaseType; 3138 3139 ObjCProtocolDecl * const *getProtocolStorage() const { 3140 return const_cast<ObjCObjectType*>(this)->getProtocolStorage(); 3141 } 3142 3143 ObjCProtocolDecl **getProtocolStorage(); 3144 3145protected: 3146 ObjCObjectType(QualType Canonical, QualType Base, 3147 ObjCProtocolDecl * const *Protocols, unsigned NumProtocols); 3148 3149 enum Nonce_ObjCInterface { Nonce_ObjCInterface }; 3150 ObjCObjectType(enum Nonce_ObjCInterface) 3151 : Type(ObjCInterface, QualType(), false, false), 3152 BaseType(QualType(this_(), 0)) { 3153 ObjCObjectTypeBits.NumProtocols = 0; 3154 } 3155 3156public: 3157 /// getBaseType - Gets the base type of this object type. This is 3158 /// always (possibly sugar for) one of: 3159 /// - the 'id' builtin type (as opposed to the 'id' type visible to the 3160 /// user, which is a typedef for an ObjCPointerType) 3161 /// - the 'Class' builtin type (same caveat) 3162 /// - an ObjCObjectType (currently always an ObjCInterfaceType) 3163 QualType getBaseType() const { return BaseType; } 3164 3165 bool isObjCId() const { 3166 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); 3167 } 3168 bool isObjCClass() const { 3169 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); 3170 } 3171 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } 3172 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } 3173 bool isObjCUnqualifiedIdOrClass() const { 3174 if (!qual_empty()) return false; 3175 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) 3176 return T->getKind() == BuiltinType::ObjCId || 3177 T->getKind() == BuiltinType::ObjCClass; 3178 return false; 3179 } 3180 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } 3181 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } 3182 3183 /// Gets the interface declaration for this object type, if the base type 3184 /// really is an interface. 3185 ObjCInterfaceDecl *getInterface() const; 3186 3187 typedef ObjCProtocolDecl * const *qual_iterator; 3188 3189 qual_iterator qual_begin() const { return getProtocolStorage(); } 3190 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } 3191 3192 bool qual_empty() const { return getNumProtocols() == 0; } 3193 3194 /// getNumProtocols - Return the number of qualifying protocols in this 3195 /// interface type, or 0 if there are none. 3196 unsigned getNumProtocols() const { return ObjCObjectTypeBits.NumProtocols; } 3197 3198 /// \brief Fetch a protocol by index. 3199 ObjCProtocolDecl *getProtocol(unsigned I) const { 3200 assert(I < getNumProtocols() && "Out-of-range protocol access"); 3201 return qual_begin()[I]; 3202 } 3203 3204 bool isSugared() const { return false; } 3205 QualType desugar() const { return QualType(this, 0); } 3206 3207 static bool classof(const Type *T) { 3208 return T->getTypeClass() == ObjCObject || 3209 T->getTypeClass() == ObjCInterface; 3210 } 3211 static bool classof(const ObjCObjectType *) { return true; } 3212}; 3213 3214/// ObjCObjectTypeImpl - A class providing a concrete implementation 3215/// of ObjCObjectType, so as to not increase the footprint of 3216/// ObjCInterfaceType. Code outside of ASTContext and the core type 3217/// system should not reference this type. 3218class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { 3219 friend class ASTContext; 3220 3221 // If anyone adds fields here, ObjCObjectType::getProtocolStorage() 3222 // will need to be modified. 3223 3224 ObjCObjectTypeImpl(QualType Canonical, QualType Base, 3225 ObjCProtocolDecl * const *Protocols, 3226 unsigned NumProtocols) 3227 : ObjCObjectType(Canonical, Base, Protocols, NumProtocols) {} 3228 3229public: 3230 void Profile(llvm::FoldingSetNodeID &ID); 3231 static void Profile(llvm::FoldingSetNodeID &ID, 3232 QualType Base, 3233 ObjCProtocolDecl *const *protocols, 3234 unsigned NumProtocols); 3235}; 3236 3237inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorage() { 3238 return reinterpret_cast<ObjCProtocolDecl**>( 3239 static_cast<ObjCObjectTypeImpl*>(this) + 1); 3240} 3241 3242/// ObjCInterfaceType - Interfaces are the core concept in Objective-C for 3243/// object oriented design. They basically correspond to C++ classes. There 3244/// are two kinds of interface types, normal interfaces like "NSString" and 3245/// qualified interfaces, which are qualified with a protocol list like 3246/// "NSString<NSCopyable, NSAmazing>". 3247/// 3248/// ObjCInterfaceType guarantees the following properties when considered 3249/// as a subtype of its superclass, ObjCObjectType: 3250/// - There are no protocol qualifiers. To reinforce this, code which 3251/// tries to invoke the protocol methods via an ObjCInterfaceType will 3252/// fail to compile. 3253/// - It is its own base type. That is, if T is an ObjCInterfaceType*, 3254/// T->getBaseType() == QualType(T, 0). 3255class ObjCInterfaceType : public ObjCObjectType { 3256 ObjCInterfaceDecl *Decl; 3257 3258 ObjCInterfaceType(const ObjCInterfaceDecl *D) 3259 : ObjCObjectType(Nonce_ObjCInterface), 3260 Decl(const_cast<ObjCInterfaceDecl*>(D)) {} 3261 friend class ASTContext; // ASTContext creates these. 3262 3263public: 3264 /// getDecl - Get the declaration of this interface. 3265 ObjCInterfaceDecl *getDecl() const { return Decl; } 3266 3267 bool isSugared() const { return false; } 3268 QualType desugar() const { return QualType(this, 0); } 3269 3270 static bool classof(const Type *T) { 3271 return T->getTypeClass() == ObjCInterface; 3272 } 3273 static bool classof(const ObjCInterfaceType *) { return true; } 3274 3275 // Nonsense to "hide" certain members of ObjCObjectType within this 3276 // class. People asking for protocols on an ObjCInterfaceType are 3277 // not going to get what they want: ObjCInterfaceTypes are 3278 // guaranteed to have no protocols. 3279 enum { 3280 qual_iterator, 3281 qual_begin, 3282 qual_end, 3283 getNumProtocols, 3284 getProtocol 3285 }; 3286}; 3287 3288inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { 3289 if (const ObjCInterfaceType *T = 3290 getBaseType()->getAs<ObjCInterfaceType>()) 3291 return T->getDecl(); 3292 return 0; 3293} 3294 3295/// ObjCObjectPointerType - Used to represent a pointer to an 3296/// Objective C object. These are constructed from pointer 3297/// declarators when the pointee type is an ObjCObjectType (or sugar 3298/// for one). In addition, the 'id' and 'Class' types are typedefs 3299/// for these, and the protocol-qualified types 'id<P>' and 'Class<P>' 3300/// are translated into these. 3301/// 3302/// Pointers to pointers to Objective C objects are still PointerTypes; 3303/// only the first level of pointer gets it own type implementation. 3304class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { 3305 QualType PointeeType; 3306 3307 ObjCObjectPointerType(QualType Canonical, QualType Pointee) 3308 : Type(ObjCObjectPointer, Canonical, false, false), 3309 PointeeType(Pointee) {} 3310 friend class ASTContext; // ASTContext creates these. 3311 3312public: 3313 /// getPointeeType - Gets the type pointed to by this ObjC pointer. 3314 /// The result will always be an ObjCObjectType or sugar thereof. 3315 QualType getPointeeType() const { return PointeeType; } 3316 3317 /// getObjCObjectType - Gets the type pointed to by this ObjC 3318 /// pointer. This method always returns non-null. 3319 /// 3320 /// This method is equivalent to getPointeeType() except that 3321 /// it discards any typedefs (or other sugar) between this 3322 /// type and the "outermost" object type. So for: 3323 /// @class A; @protocol P; @protocol Q; 3324 /// typedef A<P> AP; 3325 /// typedef A A1; 3326 /// typedef A1<P> A1P; 3327 /// typedef A1P<Q> A1PQ; 3328 /// For 'A*', getObjectType() will return 'A'. 3329 /// For 'A<P>*', getObjectType() will return 'A<P>'. 3330 /// For 'AP*', getObjectType() will return 'A<P>'. 3331 /// For 'A1*', getObjectType() will return 'A'. 3332 /// For 'A1<P>*', getObjectType() will return 'A1<P>'. 3333 /// For 'A1P*', getObjectType() will return 'A1<P>'. 3334 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because 3335 /// adding protocols to a protocol-qualified base discards the 3336 /// old qualifiers (for now). But if it didn't, getObjectType() 3337 /// would return 'A1P<Q>' (and we'd have to make iterating over 3338 /// qualifiers more complicated). 3339 const ObjCObjectType *getObjectType() const { 3340 return PointeeType->getAs<ObjCObjectType>(); 3341 } 3342 3343 /// getInterfaceType - If this pointer points to an Objective C 3344 /// @interface type, gets the type for that interface. Any protocol 3345 /// qualifiers on the interface are ignored. 3346 /// 3347 /// \return null if the base type for this pointer is 'id' or 'Class' 3348 const ObjCInterfaceType *getInterfaceType() const { 3349 return getObjectType()->getBaseType()->getAs<ObjCInterfaceType>(); 3350 } 3351 3352 /// getInterfaceDecl - If this pointer points to an Objective @interface 3353 /// type, gets the declaration for that interface. 3354 /// 3355 /// \return null if the base type for this pointer is 'id' or 'Class' 3356 ObjCInterfaceDecl *getInterfaceDecl() const { 3357 return getObjectType()->getInterface(); 3358 } 3359 3360 /// isObjCIdType - True if this is equivalent to the 'id' type, i.e. if 3361 /// its object type is the primitive 'id' type with no protocols. 3362 bool isObjCIdType() const { 3363 return getObjectType()->isObjCUnqualifiedId(); 3364 } 3365 3366 /// isObjCClassType - True if this is equivalent to the 'Class' type, 3367 /// i.e. if its object tive is the primitive 'Class' type with no protocols. 3368 bool isObjCClassType() const { 3369 return getObjectType()->isObjCUnqualifiedClass(); 3370 } 3371 3372 /// isObjCQualifiedIdType - True if this is equivalent to 'id<P>' for some 3373 /// non-empty set of protocols. 3374 bool isObjCQualifiedIdType() const { 3375 return getObjectType()->isObjCQualifiedId(); 3376 } 3377 3378 /// isObjCQualifiedClassType - True if this is equivalent to 'Class<P>' for 3379 /// some non-empty set of protocols. 3380 bool isObjCQualifiedClassType() const { 3381 return getObjectType()->isObjCQualifiedClass(); 3382 } 3383 3384 /// An iterator over the qualifiers on the object type. Provided 3385 /// for convenience. This will always iterate over the full set of 3386 /// protocols on a type, not just those provided directly. 3387 typedef ObjCObjectType::qual_iterator qual_iterator; 3388 3389 qual_iterator qual_begin() const { 3390 return getObjectType()->qual_begin(); 3391 } 3392 qual_iterator qual_end() const { 3393 return getObjectType()->qual_end(); 3394 } 3395 bool qual_empty() const { return getObjectType()->qual_empty(); } 3396 3397 /// getNumProtocols - Return the number of qualifying protocols on 3398 /// the object type. 3399 unsigned getNumProtocols() const { 3400 return getObjectType()->getNumProtocols(); 3401 } 3402 3403 /// \brief Retrieve a qualifying protocol by index on the object 3404 /// type. 3405 ObjCProtocolDecl *getProtocol(unsigned I) const { 3406 return getObjectType()->getProtocol(I); 3407 } 3408 3409 bool isSugared() const { return false; } 3410 QualType desugar() const { return QualType(this, 0); } 3411 3412 void Profile(llvm::FoldingSetNodeID &ID) { 3413 Profile(ID, getPointeeType()); 3414 } 3415 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { 3416 ID.AddPointer(T.getAsOpaquePtr()); 3417 } 3418 static bool classof(const Type *T) { 3419 return T->getTypeClass() == ObjCObjectPointer; 3420 } 3421 static bool classof(const ObjCObjectPointerType *) { return true; } 3422}; 3423 3424/// A qualifier set is used to build a set of qualifiers. 3425class QualifierCollector : public Qualifiers { 3426public: 3427 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} 3428 3429 /// Collect any qualifiers on the given type and return an 3430 /// unqualified type. 3431 const Type *strip(QualType QT) { 3432 addFastQualifiers(QT.getLocalFastQualifiers()); 3433 if (QT.hasLocalNonFastQualifiers()) { 3434 const ExtQuals *EQ = QT.getExtQualsUnsafe(); 3435 addQualifiers(EQ->getQualifiers()); 3436 return EQ->getBaseType(); 3437 } 3438 return QT.getTypePtrUnsafe(); 3439 } 3440 3441 /// Apply the collected qualifiers to the given type. 3442 QualType apply(ASTContext &Context, QualType QT) const; 3443 3444 /// Apply the collected qualifiers to the given type. 3445 QualType apply(ASTContext &Context, const Type* T) const; 3446}; 3447 3448 3449// Inline function definitions. 3450 3451inline bool QualType::isCanonical() const { 3452 const Type *T = getTypePtr(); 3453 if (hasLocalQualifiers()) 3454 return T->isCanonicalUnqualified() && !isa<ArrayType>(T); 3455 return T->isCanonicalUnqualified(); 3456} 3457 3458inline bool QualType::isCanonicalAsParam() const { 3459 if (hasLocalQualifiers()) return false; 3460 3461 const Type *T = getTypePtr(); 3462 if ((*this)->isPointerType()) { 3463 QualType BaseType = (*this)->getAs<PointerType>()->getPointeeType(); 3464 if (isa<VariableArrayType>(BaseType)) { 3465 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 3466 VariableArrayType *VAT = cast<VariableArrayType>(AT); 3467 if (VAT->getSizeExpr()) 3468 T = BaseType.getTypePtr(); 3469 } 3470 } 3471 return T->isCanonicalUnqualified() && 3472 !isa<FunctionType>(T) && !isa<ArrayType>(T); 3473} 3474 3475inline bool QualType::isConstQualified() const { 3476 return isLocalConstQualified() || 3477 getTypePtr()->getCanonicalTypeInternal().isLocalConstQualified(); 3478} 3479 3480inline bool QualType::isRestrictQualified() const { 3481 return isLocalRestrictQualified() || 3482 getTypePtr()->getCanonicalTypeInternal().isLocalRestrictQualified(); 3483} 3484 3485 3486inline bool QualType::isVolatileQualified() const { 3487 return isLocalVolatileQualified() || 3488 getTypePtr()->getCanonicalTypeInternal().isLocalVolatileQualified(); 3489} 3490 3491inline bool QualType::hasQualifiers() const { 3492 return hasLocalQualifiers() || 3493 getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers(); 3494} 3495 3496inline Qualifiers QualType::getQualifiers() const { 3497 Qualifiers Quals = getLocalQualifiers(); 3498 Quals.addQualifiers( 3499 getTypePtr()->getCanonicalTypeInternal().getLocalQualifiers()); 3500 return Quals; 3501} 3502 3503inline unsigned QualType::getCVRQualifiers() const { 3504 return getLocalCVRQualifiers() | 3505 getTypePtr()->getCanonicalTypeInternal().getLocalCVRQualifiers(); 3506} 3507 3508/// getCVRQualifiersThroughArrayTypes - If there are CVR qualifiers for this 3509/// type, returns them. Otherwise, if this is an array type, recurses 3510/// on the element type until some qualifiers have been found or a non-array 3511/// type reached. 3512inline unsigned QualType::getCVRQualifiersThroughArrayTypes() const { 3513 if (unsigned Quals = getCVRQualifiers()) 3514 return Quals; 3515 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3516 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3517 return AT->getElementType().getCVRQualifiersThroughArrayTypes(); 3518 return 0; 3519} 3520 3521inline void QualType::removeLocalConst() { 3522 removeLocalFastQualifiers(Qualifiers::Const); 3523} 3524 3525inline void QualType::removeLocalRestrict() { 3526 removeLocalFastQualifiers(Qualifiers::Restrict); 3527} 3528 3529inline void QualType::removeLocalVolatile() { 3530 removeLocalFastQualifiers(Qualifiers::Volatile); 3531} 3532 3533inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { 3534 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"); 3535 assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask); 3536 3537 // Fast path: we don't need to touch the slow qualifiers. 3538 removeLocalFastQualifiers(Mask); 3539} 3540 3541/// getAddressSpace - Return the address space of this type. 3542inline unsigned QualType::getAddressSpace() const { 3543 if (hasLocalNonFastQualifiers()) { 3544 const ExtQuals *EQ = getExtQualsUnsafe(); 3545 if (EQ->hasAddressSpace()) 3546 return EQ->getAddressSpace(); 3547 } 3548 3549 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3550 if (CT.hasLocalNonFastQualifiers()) { 3551 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3552 if (EQ->hasAddressSpace()) 3553 return EQ->getAddressSpace(); 3554 } 3555 3556 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3557 return AT->getElementType().getAddressSpace(); 3558 if (const RecordType *RT = dyn_cast<RecordType>(CT)) 3559 return RT->getAddressSpace(); 3560 return 0; 3561} 3562 3563/// getObjCGCAttr - Return the gc attribute of this type. 3564inline Qualifiers::GC QualType::getObjCGCAttr() const { 3565 if (hasLocalNonFastQualifiers()) { 3566 const ExtQuals *EQ = getExtQualsUnsafe(); 3567 if (EQ->hasObjCGCAttr()) 3568 return EQ->getObjCGCAttr(); 3569 } 3570 3571 QualType CT = getTypePtr()->getCanonicalTypeInternal(); 3572 if (CT.hasLocalNonFastQualifiers()) { 3573 const ExtQuals *EQ = CT.getExtQualsUnsafe(); 3574 if (EQ->hasObjCGCAttr()) 3575 return EQ->getObjCGCAttr(); 3576 } 3577 3578 if (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 3579 return AT->getElementType().getObjCGCAttr(); 3580 if (const ObjCObjectPointerType *PT = CT->getAs<ObjCObjectPointerType>()) 3581 return PT->getPointeeType().getObjCGCAttr(); 3582 // We most look at all pointer types, not just pointer to interface types. 3583 if (const PointerType *PT = CT->getAs<PointerType>()) 3584 return PT->getPointeeType().getObjCGCAttr(); 3585 return Qualifiers::GCNone; 3586} 3587 3588inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { 3589 if (const PointerType *PT = t.getAs<PointerType>()) { 3590 if (const FunctionType *FT = PT->getPointeeType()->getAs<FunctionType>()) 3591 return FT->getExtInfo(); 3592 } else if (const FunctionType *FT = t.getAs<FunctionType>()) 3593 return FT->getExtInfo(); 3594 3595 return FunctionType::ExtInfo(); 3596} 3597 3598inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { 3599 return getFunctionExtInfo(*t); 3600} 3601 3602/// \brief Determine whether this set of qualifiers is a superset of the given 3603/// set of qualifiers. 3604inline bool Qualifiers::isSupersetOf(Qualifiers Other) const { 3605 return Mask != Other.Mask && (Mask | Other.Mask) == Mask; 3606} 3607 3608/// isMoreQualifiedThan - Determine whether this type is more 3609/// qualified than the Other type. For example, "const volatile int" 3610/// is more qualified than "const int", "volatile int", and 3611/// "int". However, it is not more qualified than "const volatile 3612/// int". 3613inline bool QualType::isMoreQualifiedThan(QualType Other) const { 3614 // FIXME: work on arbitrary qualifiers 3615 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3616 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3617 if (getAddressSpace() != Other.getAddressSpace()) 3618 return false; 3619 return MyQuals != OtherQuals && (MyQuals | OtherQuals) == MyQuals; 3620} 3621 3622/// isAtLeastAsQualifiedAs - Determine whether this type is at last 3623/// as qualified as the Other type. For example, "const volatile 3624/// int" is at least as qualified as "const int", "volatile int", 3625/// "int", and "const volatile int". 3626inline bool QualType::isAtLeastAsQualifiedAs(QualType Other) const { 3627 // FIXME: work on arbitrary qualifiers 3628 unsigned MyQuals = this->getCVRQualifiersThroughArrayTypes(); 3629 unsigned OtherQuals = Other.getCVRQualifiersThroughArrayTypes(); 3630 if (getAddressSpace() != Other.getAddressSpace()) 3631 return false; 3632 return (MyQuals | OtherQuals) == MyQuals; 3633} 3634 3635/// getNonReferenceType - If Type is a reference type (e.g., const 3636/// int&), returns the type that the reference refers to ("const 3637/// int"). Otherwise, returns the type itself. This routine is used 3638/// throughout Sema to implement C++ 5p6: 3639/// 3640/// If an expression initially has the type "reference to T" (8.3.2, 3641/// 8.5.3), the type is adjusted to "T" prior to any further 3642/// analysis, the expression designates the object or function 3643/// denoted by the reference, and the expression is an lvalue. 3644inline QualType QualType::getNonReferenceType() const { 3645 if (const ReferenceType *RefType = (*this)->getAs<ReferenceType>()) 3646 return RefType->getPointeeType(); 3647 else 3648 return *this; 3649} 3650 3651inline bool Type::isFunctionType() const { 3652 return isa<FunctionType>(CanonicalType); 3653} 3654inline bool Type::isPointerType() const { 3655 return isa<PointerType>(CanonicalType); 3656} 3657inline bool Type::isAnyPointerType() const { 3658 return isPointerType() || isObjCObjectPointerType(); 3659} 3660inline bool Type::isBlockPointerType() const { 3661 return isa<BlockPointerType>(CanonicalType); 3662} 3663inline bool Type::isReferenceType() const { 3664 return isa<ReferenceType>(CanonicalType); 3665} 3666inline bool Type::isLValueReferenceType() const { 3667 return isa<LValueReferenceType>(CanonicalType); 3668} 3669inline bool Type::isRValueReferenceType() const { 3670 return isa<RValueReferenceType>(CanonicalType); 3671} 3672inline bool Type::isFunctionPointerType() const { 3673 if (const PointerType* T = getAs<PointerType>()) 3674 return T->getPointeeType()->isFunctionType(); 3675 else 3676 return false; 3677} 3678inline bool Type::isMemberPointerType() const { 3679 return isa<MemberPointerType>(CanonicalType); 3680} 3681inline bool Type::isMemberFunctionPointerType() const { 3682 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3683 return T->isMemberFunctionPointer(); 3684 else 3685 return false; 3686} 3687inline bool Type::isMemberDataPointerType() const { 3688 if (const MemberPointerType* T = getAs<MemberPointerType>()) 3689 return T->isMemberDataPointer(); 3690 else 3691 return false; 3692} 3693inline bool Type::isArrayType() const { 3694 return isa<ArrayType>(CanonicalType); 3695} 3696inline bool Type::isConstantArrayType() const { 3697 return isa<ConstantArrayType>(CanonicalType); 3698} 3699inline bool Type::isIncompleteArrayType() const { 3700 return isa<IncompleteArrayType>(CanonicalType); 3701} 3702inline bool Type::isVariableArrayType() const { 3703 return isa<VariableArrayType>(CanonicalType); 3704} 3705inline bool Type::isDependentSizedArrayType() const { 3706 return isa<DependentSizedArrayType>(CanonicalType); 3707} 3708inline bool Type::isBuiltinType() const { 3709 return isa<BuiltinType>(CanonicalType); 3710} 3711inline bool Type::isRecordType() const { 3712 return isa<RecordType>(CanonicalType); 3713} 3714inline bool Type::isEnumeralType() const { 3715 return isa<EnumType>(CanonicalType); 3716} 3717inline bool Type::isAnyComplexType() const { 3718 return isa<ComplexType>(CanonicalType); 3719} 3720inline bool Type::isVectorType() const { 3721 return isa<VectorType>(CanonicalType); 3722} 3723inline bool Type::isExtVectorType() const { 3724 return isa<ExtVectorType>(CanonicalType); 3725} 3726inline bool Type::isObjCObjectPointerType() const { 3727 return isa<ObjCObjectPointerType>(CanonicalType); 3728} 3729inline bool Type::isObjCObjectType() const { 3730 return isa<ObjCObjectType>(CanonicalType); 3731} 3732inline bool Type::isObjCObjectOrInterfaceType() const { 3733 return isa<ObjCInterfaceType>(CanonicalType) || 3734 isa<ObjCObjectType>(CanonicalType); 3735} 3736 3737inline bool Type::isObjCQualifiedIdType() const { 3738 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3739 return OPT->isObjCQualifiedIdType(); 3740 return false; 3741} 3742inline bool Type::isObjCQualifiedClassType() const { 3743 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3744 return OPT->isObjCQualifiedClassType(); 3745 return false; 3746} 3747inline bool Type::isObjCIdType() const { 3748 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3749 return OPT->isObjCIdType(); 3750 return false; 3751} 3752inline bool Type::isObjCClassType() const { 3753 if (const ObjCObjectPointerType *OPT = getAs<ObjCObjectPointerType>()) 3754 return OPT->isObjCClassType(); 3755 return false; 3756} 3757inline bool Type::isObjCSelType() const { 3758 if (const PointerType *OPT = getAs<PointerType>()) 3759 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); 3760 return false; 3761} 3762inline bool Type::isObjCBuiltinType() const { 3763 return isObjCIdType() || isObjCClassType() || isObjCSelType(); 3764} 3765inline bool Type::isTemplateTypeParmType() const { 3766 return isa<TemplateTypeParmType>(CanonicalType); 3767} 3768 3769inline bool Type::isSpecificBuiltinType(unsigned K) const { 3770 if (const BuiltinType *BT = getAs<BuiltinType>()) 3771 if (BT->getKind() == (BuiltinType::Kind) K) 3772 return true; 3773 return false; 3774} 3775 3776inline bool Type::isPlaceholderType() const { 3777 if (const BuiltinType *BT = getAs<BuiltinType>()) 3778 return BT->isPlaceholderType(); 3779 return false; 3780} 3781 3782/// \brief Determines whether this is a type for which one can define 3783/// an overloaded operator. 3784inline bool Type::isOverloadableType() const { 3785 return isDependentType() || isRecordType() || isEnumeralType(); 3786} 3787 3788inline bool Type::hasPointerRepresentation() const { 3789 return (isPointerType() || isReferenceType() || isBlockPointerType() || 3790 isObjCObjectPointerType() || isNullPtrType()); 3791} 3792 3793inline bool Type::hasObjCPointerRepresentation() const { 3794 return isObjCObjectPointerType(); 3795} 3796 3797/// Insertion operator for diagnostics. This allows sending QualType's into a 3798/// diagnostic with <<. 3799inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, 3800 QualType T) { 3801 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3802 Diagnostic::ak_qualtype); 3803 return DB; 3804} 3805 3806/// Insertion operator for partial diagnostics. This allows sending QualType's 3807/// into a diagnostic with <<. 3808inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, 3809 QualType T) { 3810 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), 3811 Diagnostic::ak_qualtype); 3812 return PD; 3813} 3814 3815// Helper class template that is used by Type::getAs to ensure that one does 3816// not try to look through a qualified type to get to an array type. 3817template<typename T, 3818 bool isArrayType = (llvm::is_same<T, ArrayType>::value || 3819 llvm::is_base_of<ArrayType, T>::value)> 3820struct ArrayType_cannot_be_used_with_getAs { }; 3821 3822template<typename T> 3823struct ArrayType_cannot_be_used_with_getAs<T, true>; 3824 3825/// Member-template getAs<specific type>'. 3826template <typename T> const T *Type::getAs() const { 3827 ArrayType_cannot_be_used_with_getAs<T> at; 3828 (void)at; 3829 3830 // If this is directly a T type, return it. 3831 if (const T *Ty = dyn_cast<T>(this)) 3832 return Ty; 3833 3834 // If the canonical form of this type isn't the right kind, reject it. 3835 if (!isa<T>(CanonicalType)) 3836 return 0; 3837 3838 // If this is a typedef for the type, strip the typedef off without 3839 // losing all typedef information. 3840 return cast<T>(getUnqualifiedDesugaredType()); 3841} 3842 3843} // end namespace clang 3844 3845#endif 3846